options help

The revamped options handling was't doing dynamic help properly.
After listing the booleans, it listed them again amongest the
compound options.  Since their description field is Null, that
could be a big problem.  sprintf(buf,"%s",NULL) on OSX produces
"(null)" but most sprintf()'s would probably crash instead.

The 'other' options (autopickup exceptions, menucolors, &c) were
not listed at all.  (I don't remember whether that was also the
case before the revamp.)  Now they're listed but not explained.

The 'msg_window' description was unhelpful; this replaces it.
A couple of others were longer than necessary so they've been
shortened.  The rest of optlist.h is reformatting wide lines.

Recently added 'safe_wait' option was included in the Guidebook
but not in dat/opthelp; add it.

dat/opthelp

@@ -52,6 +52,8 @@ quick_farsight usually skip the chance to browse the map when     [FALSE]
 rawio          allow the use of raw I/O                           [FALSE]
 rest_on_space  count the space bar as a rest character            [FALSE]
 safe_pet       prevent you from (knowingly) attacking your pet(s) [TRUE]
+safe_wait      require use of 'm' prefix before '.' or 's' to     [TRUE]
+               wait or search when adjacent to a hostile monster
 sanity_check   perform data sanity checks                         [FALSE]
 showexp        display your accumulated experience points         [FALSE]
 showrace       show yourself by your race rather than by role     [FALSE]