Rename LogFunc to LogFunc2 to preserve ABI compat.
Rename LogFunc to LogFunc2 to preserve ABI compat.

Preserve the incorrect LogFunc, but mark it and other callsites using it
as Obsolete.

Provide the corrected delegate as LogFunc2.

sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp