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)

include/player.h

@@ -76,7 +76,7 @@ struct player {
     int simulation;		/* e.g. budget command */
     double dolcost;
     time_t curup;		/* when last input was received */
-    int aborted;		/* interrupt cookie received? */
+    int aborted;		/* interrupt cookie or EOF received? */
     int eof;			/* EOF (cookie or real) received? */
     int recvfail;		/* #recvclient() failures */
     int curid;			/* for pr, cur. line's id, -1 none */