built-in h323 module;
o don't link main binary with h323 library and friends. This creates
issues with ooh323 module, from the asterisk-addons package.
Bump PORTREVISION.
o move all additional functionality into separate patches and make it
opt in. It has been concern of asterisks devs that the FreeBSD pacakage
adds functionalty not present in the original version, whch could be
confusing.