bug in glib event loop management

[Emanuele Giaquinta]

To reproduce:

• create a jabber account and set as server "gmail.com"

• execute 'account x on' and 'account x off'

glib starts logging indefinitely

(process:PID): GLib-WARNING : poll(2) failed due to: Bad file descriptor.

The problem is possibly caused by the fact that

• 'proxy_connect_none' creates an io watcher with 'b_input_add'

• 'gaim_io_connected' is never called

• 'account x off' triggers a 'closesocket' on the fd.

Since 'gaim_io_connected' is not called the io watcher is not removed and thus poll barfs, as the fd is invalid after 'closesocket'.

[wilmer]

#231.

Known issue. Will be fixed eventually, but really, libevent is preferred for larger-scale deployments where stability matters more.