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devip: dont panic when ports get exhausted

--- a/sys/src/9/ip/devip.c

+++ b/sys/src/9/ip/devip.c

@@ -818,12 +818,6 @@

 		}

 	}

 	qunlock(p);

-	/*

-	 * debugging: let's see if we ever get this.

-	 * if we do (and we're a cpu server), we might as well restart

-	 * since we're now unable to service new connections.

-	 */

-	panic("setlport: out of ports");

 	return "no ports available";

 chosen:

@@ -1323,9 +1317,6 @@

 			print("Fsprotoclone: garbage collecting Convs\n");

 		if(p->gc != nil && (*p->gc)(p))

 			goto retry;

-		/* debugging: do we ever get here? */

-		if (cpuserver)

-			panic("Fsprotoclone: all conversations in use");

 		return nil;

 	}