Revert "drop fork priviledges when running."

This reverts commit 1cbb1b9b7a.
It juste does not work, since this limit is uid-wide (thanks julien`)

src/bip.c

@@ -1294,15 +1294,6 @@ int main(int argc, char **argv)
 	write(fd, buf, strlen(buf));
 	close(fd);
 
-#ifdef RLIMIT_NPROC
-	struct rlimit                rlim;
-
-	/* fork() is not need anymore, disable it */
-	rlim.rlim_max = rlim.rlim_cur = 0;
-	if (setrlimit(RLIMIT_NPROC, &rlim))
-		fatal("Could not drop fork priviledges");
-#endif
-
 	bip.listener = listen_new(conf_ip, conf_port, conf_css);
 	if (!bip.listener)
 		fatal("Could not create listening socket");