Added -noscreen option to disable status and result screen.
Disable SDP detection when you use skipsdp="true" attribute on reInvite receive tag.
Added play_dtmf stuff
Merge branch 'feat-playdtmf'
Merge branch 'feat-skipsdp'
Add [date] for the current date in RFC 2822 syntax
Merge pull request #99 from SIPp/add_date_keyword

Add [date] for the current date in RFC 2822 syntax
Correct date format - SIP dates must be GMT
Merge pull request #100 from SIPp/add_date_keyword

Correct date format - SIP dates must be GMT
tests: Add regression test "framework" and test for github-#0098.
tests: Add regression tests for github-#0083.
tests: Fix regression test github-#0083-2.
Revert 807a97f to fix [local_port] when 3pcc enabled.

Reported by: Kovács Bálint
Closes: #98
Merge branch 'master', remote-tracking branch 'upstream/master'