Add .md to known extensions

doc/texdoc.tex

@@ -396,7 +396,7 @@ \subsection{Score directives}\label{ss-score}
 \subsection{File extensions and names}\label{ss-ext}
 
 The allowed file extensions are defined by the configuration item |ext_list|
-(default: pdf, html, htm, txt, ps, dvi, no extension). You can configure it
+(default: pdf, html, htm, txt, md, ps, dvi, no extension). You can configure it
 with a line |ext_list = «your, list»| in a configuration file. Be aware
 that it will completely override the default list, not add to it. An empty
 string in the list means files without extension (no dot in the name), while a
@@ -646,7 +646,7 @@ \subsubsection{Structure of configuration files}\label{sss-sonf-struct}
 
 Set the list of recognised extensions to |«list»|.  Default is
 \begin{htcode}
-  pdf, html, htm, txt, dvi, ps,
+  pdf, html, htm, txt, md, dvi, ps,
 \end{htcode}
 This list is used to filter and  sort the results that have the same
 score(with the default value: pdf first, etc).  Two special values are
@@ -671,7 +671,7 @@ \subsubsection{Structure of configuration files}\label{sss-sonf-struct}
 you can add values if you want.  For example, if you want Texdoc to be able
 to find man pages and display them with the |man| command, you can use
 \begin{htcode}
-  ext_list = pdf, html, htm, 1, 5, txt, dvi, ps,
+  ext_list = pdf, html, htm, 1, 5, txt, md, dvi, ps,
   viewer_1 = man
   viewer_5 = man
 \end{htcode}

script/config.tlu

@@ -544,7 +544,7 @@ function setup_config_from_defaults()
         mode = 'view',
         interact_switch = 'true',
         machine_switch = 'false',
-        ext_list = 'pdf, htm, html, txt, ps, dvi, ',
+        ext_list = 'pdf, htm, html, txt, md, ps, dvi, ',
         basename_list = 'readme, 00readme',
         badext_list = 'txt, ',
         badbasename_list = 'readme, 00readme',

spec/config/general_spec.rb

@@ -16,7 +16,7 @@
         "machine_switch=false",
         "max_lines=20",
         "basename_list=readme, 00readme",
-        "ext_list=pdf, htm, html, txt, ps, dvi, ",
+        "ext_list=pdf, htm, html, txt, md, ps, dvi, ",
         "interact_switch=true",
         "fuzzy_level=5",
         "rm_dir=rmdir",