Always rely on unixODBC each time a port is looking for libodbc.so
Remove odbc compat from libiodbc
This allows to install both kde and gnome at the same time
While here:
- Convert libiodbc to USES=libtool
- Convert a bunch of libiodbc dependencies to USES=libtool
- Chase libiodbc.so shlib change
- Stagify some ports
- Convert some ports to USES=pgsql
Discussed with: rakuco (kde)
With hat: portmgr
