Added Warning header when replying with 488 to re-INVITE

darcs-hash:20090330111045-58103-b62ad862999f823d32d0c282b3f8d47cd3b8f835
clients.console: clear the prompt in the end of termporary_prompt()

darcs-hash:20090330120349-b2873-4f2777576b740b5c46e18f9e00f202854fc7a8c0