Usage of __func__ for some ShowMsg - Part 1.

Signed-off-by: Shido <the.keikun@gmail.com>
Usage of __func__ for some ShowMsg - Part 2.

Signed-off-by: Shido <the.keikun@gmail.com>
Usage of __func__ for some ShowMsg - Part 3.
* Follow-up 354a5b1 and 0c40a49.

Signed-off-by: Shido <the.keikun@gmail.com>
Removed GNUC and NETBSD Check.
https://github.com/HerculesWS/Hercules/pull/300#issuecomment-47446924

Signed-off-by: Shido <the.keikun@gmail.com>