check PHP_FCGI_CHILDREN and warn if it's not set for fcgi mode

[moo]

See http://forum.lighttpd.net/topic/5207. fcgi must be in prefork mode instead of "alone mode"

[judas_iscariote]

Index: xcache.c
===================================================================
--- xcache.c    (revisión: 366)
+++ xcache.c    (copia de trabajo)

@@ -2519,6 +2529,14 @@
                }
        }

#ifndef PHP_WIN32
+       if(strcmp(sapi_module.name, "cgi-fcgi") == 0) {
+           if((getenv("PHP_FCGI_CHILDREN") == NULL) || (atoi(getenv("PHP_FCGI_CHILDREN")) < 1)) {
+                zend_error(E_WARNING, "XCache: PHP_FCGI_CHILDREN must be >=1");
+           }
+       }
+#endif
+
        xc_config_long(&xc_php_size,       "xcache.size",        "0");
        xc_config_hash(&xc_php_hcache,     "xcache.count",       "1");
        xc_config_hash(&xc_php_hentry,     "xcache.slots",      "8K");

I guess something kinda that can help... ;)