- Fix plist

Approved by:	portmgr blanket
- Fix shebangs

Approved by:	portmgr blanket
- Fix plist for MDNS_AVAHI option

Approved by:	portmgr blanket
- Fix plist for LIBDANE option

Approved by:	portmgr blanket
- Fix build for SMYRNA option

Approved by:	portmgr blanket
- Add workaround for clang bug, seems like it's unlikely to be fixed before 10.1-RELEASE