Fix #66908: php-fpm reload leaks epoll_create() file descriptor

This patch fixes descriptor leak which could lead to DoS once Max open files is reached

NEWS

@@ -11,6 +11,10 @@ PHP                                                                        NEWS
   . Fixed bug #67081 (DOMDocumentType->internalSubset returns entire DOCTYPE tag,
     not only the subset). (Anatol)
 
+- FPM:
+  . Fixed bug #66908 (php-fpm reload leaks epoll_create() file descriptor). 
+    (Julio Pintos)
+
 ?? ??? 2014, PHP 5.4.28
 
 - Core:

sapi/fpm/fpm/events/epoll.c

@@ -46,7 +46,7 @@ static struct fpm_event_module_s epoll_module = {
 
 static struct epoll_event *epollfds = NULL;
 static int nepollfds = 0;
-static int epollfd = 0;
+static int epollfd = -1;
 
 #endif /* HAVE_EPOLL */
 
@@ -103,6 +103,10 @@ static int fpm_event_epoll_clean() /* {{{ */
 		free(epollfds);
 		epollfds = NULL;
 	}
+	if (epollfd != -1) {
+		close(epollfd);
+		epollfd = -1;
+	}
 
 	nepollfds = 0;