add missing libs to configure.ac and Makefile.am
Adding more PKG_CHECK_MODULES to configure.ac will cause configure phase to already fail if dependencies are not met. Additionally, it's good practice to use @FOO_LIBS@ instead of passing -lFOO directly.
This includes and goes a bit further than #12, as it requires EVHTP version 1.2.13, containing a keepalive fix.
/cc @niol, @ciil
updated to also include oniguruma (as this does not come with libevhtp anymore).
@niol Is there something missing to get this merged?
I cannot test at the moment, but I think there may be missing the overlinking of onig that I describe in my comment: https://github.com/haiwen/seafile-server/pull/12#discussion_r137513336