treewide: Per RFC45, remove all unquoted URLs

pkgs/servers/irc/atheme/default.nix

@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A set of services for IRC networks";
-    homepage = https://atheme.github.io/;
+    homepage = "https://atheme.github.io/";
     license = licenses.isc;
     platforms = platforms.unix;
     maintainers = with maintainers; [ leo60228 ];

pkgs/servers/irc/charybdis/default.nix

@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "IRCv3 server designed to be highly scalable";
-    homepage    = https://github.com/charybdis-ircd/charybdis;
+    homepage    = "https://github.com/charybdis-ircd/charybdis";
     license     = licenses.gpl2;
     maintainers = with maintainers; [ lassulus fpletz ];
     platforms   = platforms.unix;

pkgs/servers/irc/ircd-hybrid/default.nix

@@ -21,6 +21,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "An IPv6-capable IRC server";
     platforms = stdenv.lib.platforms.unix;
-    homepage = http://www.ircd-hybrid.org/;
+    homepage = "http://www.ircd-hybrid.org/";
   };
 }

pkgs/servers/irc/ngircd/default.nix

@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Next Generation IRC Daemon";
-    homepage    = https://ngircd.barton.de;
+    homepage    = "https://ngircd.barton.de";
     license     = stdenv.lib.licenses.gpl2;
     platforms   = stdenv.lib.platforms.all;
   };