script: udp_mtu fallback script config & commands
new config variables:
- udp_mtu = number - size in bytes after which fallback to
another protocol will be attempted. Default 0 (off),
recommended 1300.
- udp_mtu_try_proto = TCP|TLS|SCTP|UDP - protocol to fallback to.
Default: UDP (off).
- force_rport = yes|no - global force_rport().
new script commands:
- udp_mtu_try_proto(TCP|TLS|SCTP|UDP) - like udp_mtu_try_proto
above but works on a per packet basis and not globally.
Author: Andrei Pelinescu-Onciul <andrei@iptel.org>