srv.el is now a separate package in MELPA, so let's depend on that. Keep a copy in jabber-fallback-lib for the time being.
fsm.el is now in GNU ELPA, so let's use it if it's installed. Also, let the jabber package depend on it. Keep a copy in jabber-fallback-lib directory, and use it if necessary. Notably, this one is still compatible with Emacs 23.
Creator: Magnus Henoch <mange@freemail.hu> _Really_ add jabber-pkg.el.in. Don't distribute jabber-pkg.el in non-ELPA builds.