Revert "Perform execv in a forked child process, waiting on the original to exit to allow resources to be released."

This reverts commit b0fa94d52a.

Loses control of the terminal.

cgminer.c

@@ -2889,9 +2889,6 @@ static void clean_up(void);
 
 void app_restart(void)
 {
-	pid_t parent, child;
-	int status;
-
 	applog(LOG_WARNING, "Attempting to restart %s", packagename);
 
 	__kill_work();
@@ -2904,15 +2901,7 @@ void app_restart(void)
 	}
 #endif
 
-	parent = getpid();
-	child = fork();
-	if (child) {
-		applog(LOG_WARNING, "Shutting down original process");
-		exit(0);
-	}
-	waitpid(parent, &status, 0);
 	execv(initial_args[0], (EXECV_2ND_ARG_TYPE)initial_args);
-	/* We shouldn't get here */
 	applog(LOG_WARNING, "Failed to restart application");
 }