chore(docs): update LTN12 links (#428)

docs/ftp.html

@@ -55,7 +55,7 @@ protocol.  For that, check the implementation.
 
 <p>
 To really benefit from this module, a good understanding of
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">
 LTN012, Filters sources and sinks</a> is necessary.
 </p>
 
@@ -122,7 +122,7 @@ expects at least the fields <tt>host</tt>, <tt>sink</tt>, and one of
 <tt>argument</tt> or <tt>path</tt> (<tt>argument</tt> takes
 precedence). <tt>Host</tt> is the server to connect to. <tt>Sink</tt> is
 the <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 sink that will receive the downloaded data. <tt>Argument</tt> or
 <tt>path</tt> give the target path to the resource in the server. The
 optional arguments are the following:
@@ -136,7 +136,7 @@ authentication. Defaults to "<tt>ftp:anonymous@anonymous.org</tt>";</li>
 <li><tt>type</tt>: The transfer mode. Can take values "<tt>i</tt>" or
 "<tt>a</tt>". Defaults to whatever is the server default;</li>
 <li><tt>step</tt>:
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 pump step function used to pass data from the
 server to the sink. Defaults to the LTN12 <tt>pump.step</tt> function;</li>
 <li><tt>create</tt>: An optional function to be used instead of
@@ -206,7 +206,7 @@ expects at least the fields <tt>host</tt>, <tt>source</tt>, and one of
 <tt>argument</tt> or <tt>path</tt> (<tt>argument</tt> takes
 precedence). <tt>Host</tt> is the server to connect to. <tt>Source</tt> is
 the <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 source that will provide the contents to be uploaded.
 <tt>Argument</tt> or
 <tt>path</tt> give the target path to the resource in the server. The
@@ -221,7 +221,7 @@ authentication. Defaults to "<tt>ftp:anonymous@anonymous.org</tt>";</li>
 <li><tt>type</tt>: The transfer mode. Can take values "<tt>i</tt>" or
 "<tt>a</tt>". Defaults to whatever is the server default;</li>
 <li><tt>step</tt>:
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 pump step function used to pass data from the
 server to the sink. Defaults to the LTN12 <tt>pump.step</tt> function;</li>
 <li><tt>create</tt>: An optional function to be used instead of

docs/http.html

@@ -52,7 +52,7 @@ implementation    conforms     to    the    HTTP/1.1     standard,
 The module exports functions that provide HTTP functionality in different
 levels of abstraction. From the simple
 string oriented requests, through generic
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a> based, down to even lower-level if you bother to look through the source code.
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a> based, down to even lower-level if you bother to look through the source code.
 </p>
 
 <p>
@@ -144,7 +144,7 @@ http.<b>request{</b><br>
 The request function has two forms. The simple form downloads
 a URL using the <tt>GET</tt> or <tt>POST</tt> method and is based
 on strings. The generic form performs any HTTP method and is
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a> based.
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a> based.
 </p>
 
 <p class="parameters">
@@ -158,7 +158,7 @@ in the <tt>url</tt>. Otherwise, it performs a <tt>GET</tt> in the
 <p class="parameters">
 If the first argument is instead a table, the most important fields are
 the <tt>url</tt> and the <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 <tt>sink</tt> that will receive the downloaded content.
 Any part of the <tt>url</tt> can be overridden by including
 the appropriate field in the request table.
@@ -172,13 +172,13 @@ following:
 <li><tt>method</tt>: The HTTP request method. Defaults to "GET";</li>
 <li><tt>headers</tt>: Any additional HTTP headers to send with the request;</li>
 <li><tt>source</tt>: <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 source to provide the request body. If there
 is a body, you need to provide an appropriate "<tt>content-length</tt>"
 request header field, or the function will attempt to send the body as
 "<tt>chunked</tt>" (something few servers support). Defaults to the empty source;</li>
 <li><tt>step</tt>:
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 pump step function used to move data.
 Defaults to the LTN12 <tt>pump.step</tt> function.</li>
 <li><tt>proxy</tt>: The URL of a proxy server to use. Defaults to no proxy;</li>

docs/mime.html

@@ -54,7 +54,7 @@ MIME is described mainly in
 <p>
 All functionality provided by the MIME module
 follows the ideas presented in
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">
 LTN012, Filters sources and sinks</a>.
 </p>
 

docs/smtp.html

@@ -57,7 +57,7 @@ of the MIME standard, but described mainly
 in <a href="http://www.ietf.org/rfc/rfc2046.txt">RFC 2046</a>.</p>
 
 <p> In the description below, good understanding of <a
-href="http://lua-users.org/wiki/FiltersSourcesAndSinks"> LTN012, Filters
+href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md"> LTN012, Filters
 sources and sinks</a> and the  <a href="mime.html">MIME</a> module is
 assumed.  In fact, the SMTP module was the main reason for their
 creation. </p>
@@ -122,7 +122,7 @@ smtp.<b>message(</b>mesgt<b>)</b>
 
 <p class="description">
 Returns a <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a> source that sends an SMTP message body, possibly multipart (arbitrarily deep).
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a> source that sends an SMTP message body, possibly multipart (arbitrarily deep).
 </p>
 
 <p class="parameters">
@@ -155,7 +155,7 @@ multipart-mesgt = {<br>
 For a simple message, all that is needed is a set of <tt>headers</tt>
 and the <tt>body</tt>. The message <tt>body</tt> can be given as a string
 or as a <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 source. For multipart messages, the body is a table that
 recursively defines each part as an independent message, plus an optional
 <tt>preamble</tt> and <tt>epilogue</tt>.
@@ -163,7 +163,7 @@ recursively defines each part as an independent message, plus an optional
 
 <p class="return">
 The function returns a <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 source that produces the
 message contents as defined by <tt>mesgt</tt>, chunk by chunk.
 Hopefully, the following
@@ -264,7 +264,7 @@ The sender is given by the e-mail address in the <tt>from</tt> field.
 address, or a string
 in case there is just one recipient.
 The contents of the message are given by a <em>simple</em>
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 <tt>source</tt>. Several arguments are optional:
 </p>
 <ul>
@@ -276,7 +276,7 @@ methods if supported by the server (both are unsafe);</li>
 <li> <tt>domain</tt>: Domain name used to greet the server; Defaults to the
 local machine host name;</li>
 <li> <tt>step</tt>:
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 pump step function used to pass data from the
 source to the server. Defaults to the LTN12 <tt>pump.step</tt> function;</li>
 <li><tt>create</tt>: An optional function to be used instead of
@@ -308,7 +308,7 @@ Only recipients specified in the <tt>rcpt</tt> list will receive a copy of the
 message.  Each recipient of an SMTP mail message receives a copy of the
 message body along with the headers, and nothing more.  The headers
 <em>are</em> part of the message and should be produced by the
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 <tt>source</tt> function. The <tt>rcpt</tt> list is <em>not</em>
 part of the message and will not be sent to anyone.
 </p>

docs/socket.html

@@ -311,7 +311,7 @@ socket.<b>sink(</b>mode, socket<b>)</b>
 
 <p class="description">
 Creates an
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 sink from a stream socket object.
 </p>
 
@@ -386,7 +386,7 @@ socket.<b>source(</b>mode, socket [, length]<b>)</b>
 
 <p class="description">
 Creates an
-<a href="http://lua-users.org/wiki/FiltersSourcesAndSinks">LTN12</a>
+<a href="https://github.com/lunarmodules/luasocket/blob/master/ltn012.md">LTN12</a>
 source from a stream socket object.
 </p>