detection revamp

Change most instances of detection to offer the player a chance to
move the cursor around on the map so that the getpos() autodescribe
feature can explain things that might go away as soon as the
current detection completes.  The few instances that don't offer
such a chance are the ones where everything which has been revealed
will still be there once the action finishes (such as regular magic
mapping and blessed/persistent monster detection).

There were quite a lot of inconsistencies in things like handling
for detection while swallowed or underwater.  I didn't keep track
of them to distinguish between 3.6.0, current dev code, or my patch
in progess.  They should be much more consistent now but without a
comprehensive fixes36.1 entry.

Blessed clairvoyance (divination spells at skilled or expert) now
shows monsters as well as terrain.  I first had it like that for
any clairvoyance, but having getpos/autodescribe kick in every 15
or 30 turns once you have the amulet--or pay the appropriate amount
to a temple preist--was nearly unplayable.  When it only follows an
explicit spell cast it is not intrusive.

doc/fixes36.1

@@ -280,6 +280,8 @@ thrown potion that killed peaceful monster would cause "the <mon> gets argry"
 	after the message about it being killed
 when poly'd into a hider and engulfed, attempt to hide via #monster was blocked
 	but feedback said "can't hide while held" rather than "while engulfed"
+various monster/object/food/gold/trap detections were inconsistent in how they
+	behaved if performed while engulfed or underwater
 
 
 Fixes to Post-3.6.0 Problems that Were Exposed Via git Repository
@@ -395,9 +397,12 @@ during end of game disclosure, the vanquished monsters list can be sorted in
 	one of several ways by answering 'a' to "disclose vanquished monsters?"
 when #terrain is displaying a censored version of the map (no monsters, &c),
 	moving the cursor will display farlook's brief autodescribe feedback
+when monster/object/trap detection temporarily clears the map to highlight the
+	results of such detection, farlook autodescibe can be used to view it
 interrupt a multi turn action if hp or pw is restored to maximum
 pressing d or D when cursor positioning targets doors and doorways
 pressing x or X when cursor positioning targets possibly unexplored location
+	(potentially useful when using '_' [not mouse] to invoke travel)
 
 
 Platform- and/or Interface-Specific New Features
@@ -420,10 +425,10 @@ X11: status display split into three columns to accomodate Stone/Deaf/Lev/&c;
 NetHack Community Patches (or Variation) Included
 -------------------------------------------------
 Malcolm Ryan's improved tin opener
-Ray Chason's keyboard may stop responding after locking or unlocking a door when
-	using altkeyhandler=nhraykey.dll 
-Ray Chason's fix: window interfaces that support transparency may give away unseen
-	parts of the map
+Ray Chason's keyboard may stop responding after locking or unlocking a door
+	when using altkeyhandler=nhraykey.dll
+Ray Chason's fix: window interfaces that support transparency may give away
+	unseen parts of the map
 Ray Chason's xprname should honor iflags.menu_tab_sep
 Ray Chason's punctuation for "That foo is really a mimic."
 Ray Chason's proper background tiles for lava and water