g_get_real_name() and GECOS

[Owen Taylor <otaylor redhat com>]

Just realized that g_get_real_name() returns the whole
GECOS field rather than just the name part on Unix :-(

I don't think most callers are expecting this, and it
isn't documented. But it's conceivable that some people
are

Opinions on whether we can/should change this?

Regards,
					Owen