Increase MAX command, and arg., length: 64 -> 256

With non-standard paths, e.g., when running `make distcheck`, the
absolute path to some commands become ridiculously long.  However,
this has been a recurring issue for some users in the past, so it
is time to increase the capabilibieies of Finit to cover this.

Yes, a better way is probably to allocate all these strings when they
are used, but that would require a redesign of the initctl API and
likely cause a lot of regressions before everything has stabilized.

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

plugins/modules-load.c

@@ -101,7 +101,7 @@ static int modules_load(const char *file, int index)
 	}
 
 	while ((line = fparseln(fp, NULL, NULL, NULL, 0))) {
-		char cmd[CMD_SIZE * 2], *mod, *args, *set;
+		char cmd[CMD_SIZE], *mod, *args, *set;
 
 		/*
 		 * fparseln() skips regular UNIX comments only.