[travis] clang test
[os_net] null terminate buffer in 'OS_RecvConnUDP'
[travis] add fast_finish; exclude windows build and clang compiler
[travis] add comment for change
[travis] fix linux agent build
Merge pull request #266 from cgzones/travis

travis improvements.
Merge branch 'master' of https://github.com/ossec/ossec-hids