Invalid user ID (and maybe group ID) should not fail entire start

[Michael Shadle]

Starting php_fpm Oct 27 09:33:47.445422 [ERROR] fpm_unix_conf_wp(), line 91: cannot get uid for user user22', pool 'user22'

If the user does not exist, the entire daemon will not start. Instead it should issue a warning and ignore that specific pool instead.

Last night my daemons all died because I removed a user and after making a mental note to remove their FastCGI pool, forgot about it, and when the logfiles were reloaded it took out all of them...

(this is using php 5.2.11 w/ the patch - the new FPM shouldn't have this issue)