opensips: cleanup headers
opensips: Corrected syntax for dlg_flags.
opensips: can't mix strings and numbers, and no way to convert numbers to string.

However $rp accepts both.
test: opensips set debug level and match log level.
downgrade freeswitch

issues in production with `master` versions sending original INVITE extra-headers in re-INVITE, causing issues (`X-CCNQ3-Extra` causes failures due to fragmentation; `X-CCNQ3-MediaProxy: on` causes lack of mediaproxy rewrite on reINVITES SDP).
Added SIP warning.
Merge branch 'master' into debian
Update changelog for 0.0.240 release
debian: bump freeswitch version to installable one
test: freeswitch-release (initial)
test: initial attempt with sipp
test: no stats, no media
test: valid test-with-reinvite
test: more logs!
freeswitch: multiunset before re-INVITEs come in
test: updated test suite that shows the difference
freeswitch dep: latest update
Merge branch 'master' into debian
Update changelog for 0.0.241 release
opensips: starting to get rid of `macros`