TODO:
[] submit patches upstream (gnome-sharp20)
NOTE: net/avahi-sharp depends on net/avahi-app, which is maintained by gnome@
Commit message:
```
Update ancillary mono ports
x11-toolkits/gnome-sharp20:
- update to version 2.24.4
- use github for sources
- use autoreconf and provided bootstrap script (pre-configure)
- remove gettext-runtime, not used by port
- order USES section, move non-USES related variables to own section
x11-toolkits/gtk-sharp20:
- update to version 2.12.45
- remove gettext-runtime, not used by port
- order USES section, move non-USES related variables to own section
```