and while there sort the list of disallowed rules.

Given that env/param are new features of this release, no support for the "old" syntax is needed.

In the same spite of the last commit, add the missing separators between strings to avoid the auto-concat pitfalls. `=>' is used to separate between `env' and `param' arguments, while for `fastcgi' the keyword `port' is required between the hostname/ip address and the port (if provided). Since `env', `param' and `fastcgi' are all new stuff, there's no need to keep compatibility.

With the newish automatic string concatenation, options like `mime' that accepts two strings as parameter start to become ambiguous: which strings gets concatenated? Instead of trying to document in the manpage which argument(s) is subject to string concatenation, do the concat always and introduce a separator. In the case of mime, `to-ext' now acts as a separator to distinguish. While there, also use a new keyword because it sounds better. It's dead-easy to upgrade to the new configuration, possibly with some sed magic, but for the moment the old `mime' form is preserved: (with a warning!) Will be dropped in the next release.

not that it's a bottleneck, but it's fancier this way.

Setting the environment variable SKIP_RUNTIME_TESTS to 1 will prevent the runtime tests. This is useful when running the tests inside a sandbox. based on a similar diff by Anna "CyberTailor"

OpenBSD accept it, but FreeBSD disallows it. PF_UNSPEC (or 0) should be used instead. The FastCGI bit in the regress suite still doesn't work on FreeBSD, but at least now it starts.

make sure we always close every fd in every possible code path; while there, also add a log_err if fork(2) failed.