Replace c55.me links

doc/lua_api.txt

 Minetest Lua Modding API Reference 0.4.6
 ========================================
-More information at http://c55.me/minetest/
+More information at http://www.minetest.net/
+Developer Wiki: http://dev.minetest.net/
 
 Introduction
 -------------

doc/minetest.6

@@ -88,7 +88,7 @@ This man page was originally written by
 Juhani Numminen <juhaninumminen0@gmail.com>.
 
 .SH WWW
-http://c55.me/minetest/
+http://www.minetest.net/
 
 .SH "SEE ALSO"
 .BR minetestserver(6)

doc/minetestserver.6

@@ -64,7 +64,7 @@ This man page was originally written by
 Juhani Numminen <juhaninumminen0@gmail.com>.
 
 .SH WWW
-http://c55.me/minetest/
+http://www.minetest.net/
 
 .SH "SEE ALSO"
 .BR minetest(6)

minetest.conf.example

@@ -8,7 +8,7 @@
 # Uncomment settings by removing the preceding #.
 #
 # Further documentation:
-# http://c55.me/minetest/wiki/doku.php
+# http://wiki.minetest.com/
 #
 # NOTE: This file might not be up-to-date, refer to the
 #       defaultsettings.cpp file for an up-to-date list: