#12103 - CI for OpenBSD (#12105)

* Working on OpenBSD CI
* Condense steps into 2 steps to make output easier to follow.
* Move up one directory after csources build.
* Remove FreeBSD build manifest and add OpenBSD test ignores for coroutines and hot code reloading.
* If runCI fails, run the test results script.
* Add email trigger for build failure
* Remove .git from repository URL
* Disable SFML test on OpenBSD
* Disable tgetaddrinfo on OpenBSD as only UDP and TCP protocols are supported.
* Remove getFilePermissions as it causes CI test failures with NimScript.
* Set clang as cc in nim.cfg and use gmake to build csources.
* Add getCurrentDir to nimscript.
* Remove duplicate getCurrentDir and check for not weirdTarget.
* Add CI badge for OpenBSD.
* Disable tests which allocate lots of memory for OpenBSD.
* Use `CORO_BACKEND_SETJMP` on OpenBSD rather than ucontext.
* Simplify building of koch
* Disable t8657 on OpenBSD. See issue #13760.
* Fix #12142 - tarray_of_channels fails on OpenBSD
* Disable thhtpclient_ssl and tosprocterminate on OpenBSD. These tests can be enabled at a later date after fixing them.
* Install libffi.
* Set path to libc for openbsd.
* Disable tevalffi for now.
* Remove tevalffi.nim.
* Use ncpuonline sysctl rather than ncpu.
* Disable tacceptcloserace and tasynchttpserver on OpenBSD.
* Enable tacceptcloserace and tasynchttpserver.
* Fix #13775 as suggested by @alaviss - use /bin/cat on OpenBSD rather than /bin/sh.
* Enable test on OpenBSD.
* Disable tflowvar on OpenBSD.

tests/system/trealloc.nim

@@ -1,6 +1,7 @@
 discard """
   output: '''success'''
   joinable: false
+  disabled: "openbsd"
 """
 
 # bug #4818