Error out and set an exception if camel_pop3_engine_new() returns NULL

Error out and set an exception if camel_pop3_engine_new() returns NULL

2004-06-24  Jeffrey Stedfast  <fejj@novell.com>

	* providers/pop3/camel-pop3-store.c (connect_to_server): Error out
	and set an exception if camel_pop3_engine_new() returns NULL
	(which it can do now).

	* providers/pop3/camel-pop3-engine.c (get_capabilities): No longer
	reads the greeting.
	(camel_pop3_engine_new): Reads the greeting itself and returns
	NULL if an error occurs (like stupid braindamaged piece of shit
	POP servers that spew debug prinfs).