Replace sourforge reference to the new site

doc/xmlrpc/README.txt

@@ -1,3 +1,3 @@
 This directory contains sample scripts to interact with aria2 via
 XML-RPC. For more information, see
-http://sourceforge.net/apps/trac/aria2/wiki/XmlrpcInterface
+https://aria2.github.io/manual/en/html/aria2c.html#rpc-interface

po/Makevars

@@ -34,7 +34,7 @@ COPYRIGHT_HOLDER = Tatsuhiro Tsujikawa
 # It can be your email address, or a mailing list address where translators
 # can write to without being subscribed, or the URL of a web page through
 # which the translators can contact you.
-MSGID_BUGS_ADDRESS = http://aria2.sourceforge.net/
+MSGID_BUGS_ADDRESS = https://aria2.github.io/
 
 # This is the list of locale categories, beyond LC_MESSAGES, for which the
 # message catalogs shall be used.  It is usually empty.

src/libaria2.pc.in

@@ -35,7 +35,7 @@ includedir=@includedir@
 
 Name: aria2
 Description: High speed download utility library
-URL: http://aria2.sourceforge.net/
+URL: https://aria2.github.io/
 Version: @VERSION@
 Libs: -L${libdir} -laria2
 # TODO Add Requires.private: here