Fix treatment of EOF from player

Commit 79407e68 (v4.3.11) changed recvclient() to keep failing after
receiving EOF from player.  This was bad, because some places getting
input check player->aborted instead of recvclient() failure, and
player->aborted wasn't set on EOF.  Bugs caused by this:

* comm_bomb(), ship_bomb(), plane_bomb(), land_bomb() went into an
  infinite loop that eventually ate all memory.

* deli(), desi(), dist(), fly(), morale(), zdon(), att_prompt(),
  ask_move_in() interpreted EOF as empty input instead of no more
  input.

* cmd_sail_ship() dereferenced a null pointer.

Fix by setting player->aborted on EOF, too.
(cherry picked from commit b3a7a8ee11)

src/lib/player/player.c

@@ -111,7 +111,7 @@ player_main(struct player *p)
 
     while (status()) {
 	command();
-	player->aborted = 0;
+	player->aborted = player->eof;
 	empth_yield();
     }
     /* #*# I put the following line in to prevent server crash -KHS */