[sr-dev] siptrace module of master back to 5.2 level

I haven't got any response about the misery with siptrace module. I checked its commit history and become to the conclusion that many commits to master were done without any review whatsoever. For example, there was this commit: siptrace: remove unused trace flag ionutionita92 authored and henningw committed on Mar 19 which obviously badly broke normal use of the module. Then 10 days later the commit was reverted: siptrace: add trace_flag after it was removed ionutionita92 authored and henningw committed 29 days ago This is not how Kamailio should be developed. I'm proposing to revert the module back to 5.2 level after which new commits can be made to it provided that each commit is carefully tested before deployed. -- Juha