Fix accepting connections from hosts with "long" IPv6 address

This could fail because struct player member hostaddr had insufficient
space.  Should have been enlarged in commit 19d88af3.

include/player.h

@@ -58,7 +58,7 @@ enum player_sleep {
 struct player {
     struct emp_qelem queue;
     empth_t *proc;
-    char hostaddr[32];
+    char hostaddr[46];
     char hostname[512];		/* may be empty */
     char client[128];		/* may be empty */
     char userid[32];		/* may be empty */