Update README: irc server, more http: -> https:

README

@@ -70,8 +70,8 @@ can help. PLEASE let us know via IRC or the gnucash-devel mailing list what
 you can work on or help with.
 
 See also:
-* http://wiki.gnucash.org/wiki/Documentation_Update_Instructions
-* http://wiki.gnucash.org/wiki/Translation
+* https://wiki.gnucash.org/wiki/Documentation_Update_Instructions
+* https://wiki.gnucash.org/wiki/Translation
 
 Other Formats
 #############
@@ -211,8 +211,8 @@ https://github.com/Gnucash/gnucash-docs/.
 - With any problems you have, you can contact us in the following ways:
 
 * quick questions via IRC
-** en: irc://irc.gnome.org/gnucash 
-: see http://wiki.gnucash.org/wiki/IRC
+** en: irc://irc.gimp.net/gnucash 
+: see https://wiki.gnucash.org/wiki/IRC
 
 * translation related questions preferable via the local mailing lists
 ** de: https://lists.gnucash.org/mailman/listinfo/gnucash-de