Fix GCC 9 string trunction warning

- Increase size of resulting path buffer, unlikely a real problem
- Check return value from snprintf() to detect errors and truncation
- Add logit() function wrapper to initctl, maps to _e()/_d()/_pe()

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/svc.h

@@ -95,7 +95,7 @@ typedef struct svc {
 
 	/* Service details */
 	pid_t	       pid;
-	char           pidfile[MAX_ARG_LEN];
+	char           pidfile[256];
 	long           start_time;     /* Start time, as seconds since boot, from sysinfo() */
 	const svc_state_t state;       /* Paused, Reloading, Restart, Running, ... */
 	svc_type_t     type;	       /* Service, run, task, inetd, ... */