Change stdin member of svc to stdin_fd

'stdin' is a macro in stdio.h, so it shouldn't be used as a member name. GLIBC happens to have "#define stdin stdin", but other libcs don't.

svc.h

@@ -99,7 +99,7 @@ typedef struct svc {
 
 	/* For inetd services */
 	inetd_t        inetd;
-	int            stdin;
+	int            stdin_fd;
 
 	int log;