fastcgi: a first implementation Not production-ready yet, but it's a start. This adds a third ``backend'' for gmid: until now there it served local files or CGI scripts, now FastCGI applications too. FastCGI is meant to be an improvement over CGI: instead of exec'ing a script for every request, it allows to open a single connection to an ``application'' and send the requests/receive the responses over that socket using a simple binary protocol. At the moment gmid supports three different methods of opening a fastcgi connection: - local unix sockets, with: fastcgi "/path/to/sock" - network sockets, with: fastcgi tcp "host" [port] port defaults to 9000 and can be either a string or a number - subprocess, with: fastcgi spawn "/path/to/program" the fastcgi protocol is done over the executed program stdin of these, the last is only for testing and may be removed in the future. P.S.: the fastcgi rule is per-location of course :)

factorize all "only once" checks and while there add some more

allow ``root'' rule to be specified per-location block

always use ensure_absolute_path and improve its error message

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added ``alias'' option to define hostname aliases for a server

fix some logging - we can't use log_* or fatal() before logger_init - err -> errx if errno isn't involved

added ``env'' option to define environment vars for CGI scripts

list instead of fixed-size array for vhosts and locations saves some bytes of memory and removes the limit on the maximum number of vhosts and location blocks.

give each server process its own socket for the executor this fixes a bug introduced with the prefork mechanics: every server process shared the same socket, and this would cause a race condition when multiple server processes asked for a script cgi being executed. This gives each server process its own socket to talk to the executor, so the race cannot happen.

add `log on/off' to enable/disable logs per-location

fix "first location" bug reported by devel at datenbrei dot de. The first location would overwrite the default value for a server, triggering the "`foo' rule specified more than once" error. This also needed a small tweak on how we match locations to avoid breaking other tests.

typo

improve errors during config parsing

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