quote homepages for better clickability

Done while I was traversing packages which I maintain to save extra clicks on
urxvt (it captures semicolon as a part of URL).

pkgs/servers/uwsgi/default.nix

@@ -81,7 +81,7 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_LINK = [ "-lsystemd" ];
 
   meta = with stdenv.lib; {
-    homepage = http://uwsgi-docs.readthedocs.org/en/latest/;
+    homepage = "http://uwsgi-docs.readthedocs.org/en/latest/";
     description = "A fast, self-healing and developer/sysadmin-friendly application container server coded in pure C";
     license = licenses.gpl2;
     maintainers = with maintainers; [ abbradar ];