Because we trap the error signal and run a error handler, logs were not
printed. I moved the printing of test-suite.log to the error handler and
also added so that config.log is printed on failure.
* Add .builds/openbsd.yml for builds.sr.ht
* Update travis-build.sh -> ci-build.sh with OpenBSD case
* Fix libdl check in configure.ac (OpenBSD has libdl built-in)
* Fix some minor issues found when compiling on OpenBSD with GCC (e.g.
uninitialized variables)
