man page updates

Update the man pages and generated text copies for nethack and recover.
I haven't looked at the other four (dlb, makedefs, dgn_comp, lev_comp).

recover's page referred to INSURANCE as being conditional, which is no
longer the case.  nethack's page was missing a bunch of files to be
found in the playground and also a couple of environment variables.
I haven't read through the text of the page to try to see whether other
updates are warranted.

The generated text is wider than the previous copy (one or two space
right margin instead of 5 or so).  I just used 'make nethack.txt' and
'make recover.txt' so don't know why that changed.  (The older, wider
margin looks better, so if anyone knows how to fix this, please do.
And there's got to be a better way to force a blank line inside a
table than my <space><tab> hack.)

doc/nethack.6

@@ -1,5 +1,5 @@
-.TH NETHACK 6 "6 March 2004"
-.\" NetHack 3.6  nethack.6	$NHDT-Date: 1432512786 2015/05/25 00:13:06 $  $NHDT-Branch: master $:$NHDT-Revision: 1.10 $
+.TH NETHACK 6 "7 December 2015"
+.\" NetHack 3.6  nethack.6	$NHDT-Date: 1449616496 2015/12/08 23:14:56 $  $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.11 $
 .SH NAME
 nethack \- Exploring The Mazes of Menace
 .SH SYNOPSIS
@@ -226,10 +226,17 @@ development by the Usenet.  Andries Brouwer has made this request for the
 distinction, as he may eventually release a new version of his own.
 .SH FILES
 .PP
-All files are in the playground, normally /usr/games/lib/nethackdir.
+Run-time configuration options were discussed above and use a platform
+specific name for a file in a platform specific location.  For Unix, the
+name is '.nethackrc' in the user's home directory.
+
+.br
+All other files are in the playground directory,
+normally /usr/games/lib/nethackdir.
 If DLB was defined during the compile, the data files and special levels
 will be inside a larger file, normally nhdat, instead of being separate
 files.
+
 .br
 .DT
 .ta \w'cmdhelp, opthelp, wizhelp\ \ \ 'u
@@ -237,7 +244,18 @@ nethack		The program itself.
 .br
 data, oracles, rumors	Data files used by NetHack.
 .br
-options, quest.dat	More data files.
+quest.dat, bogusmon	More data files.
+.br
+engrave, epitaph, tribute	Still more data files.
+.br
+symbols	Data file holding sets of specifications
+.br
+	for how to display monsters, objects, and
+.br
+	map features.
+.br
+options	Data file containing a description of the
+	build-time option settings.
 .br
 help, hh	Help data files.
 .br
@@ -253,26 +271,63 @@ license	Rules governing redistribution.
 .br
 record	The list of top scorers.
 .br
-logfile	An extended list of games
+logfile	An extended list of games played
 .br
-	played.
+	(optional).
 .br
-xlock.nnn	Description of a dungeon level.
+xlogfile	A more detailed version of 'logfile'
 .br
-perm	Lock file for xlock.dd.
+	(also optional).
 .br
-bonesDD.nn	Descriptions of the ghost and
+paniclog	Record of exceptional conditions
 .br
-	belongings of a deceased
+	discovered during program execution.
 .br
-	adventurer.
+xlock.nn	Description of dungeon level 'nn' of
 .br
-save	A subdirectory containing the
+	active game 'x' if there's a limit on the
 .br
-	saved games.
+	number of simultaneously active games.
+.br
+UUcccccc.nn	Alternate form for dungeon level 'nn'
+.br
+	of active game by user 'UU' playing
+.br
+	character named 'cccccc' when there's no
+.br
+	limit on number of active games.
+.br
+perm	Lock file for xlock.0 or UUcccccc.0.
+.br
+bonesDD.nn	Descriptions of the ghost and belongings
+.br
+	of a deceased adventurer who met his
+.br
+	or her demise on level 'nn'.
+.br
+.\"following line should contain <space><tab>
+ 	
+.br
+save/	A subdirectory containing saved games.
+.br
+.\"following line should contain <space><tab>
+ 	
+.br
+sysconf	System-wide options.  Required if
+.br
+	program is built with 'SYSCF' option
+.br
+	enabled, ignored if not.
+.br
+
+The location of 'sysconf' is specified at build time and can't be changed
+except by updating source file "config.h" and rebuilding the program.
+.br
+
+In a perfect world, 'paniclog' would remain empty.
 .SH ENVIRONMENT
 .DT
-.ta \w'HACKPAGER or PAGER\ \ \ 'u
+.ta \w'NETHACKDIR or HACKDIR\ \ \ 'u
 USER or LOGNAME	Your login name.
 .br
 HOME		Your home directory.
@@ -289,14 +344,20 @@ MAILREADER	Replacement for default reader
 .br
 	(probably /bin/mail or /usr/ucb/mail).
 .br
-NETHACKDIR	Playground.
+NETHACKDIR or HACKDIR	Playground.
 .br
 NETHACKOPTIONS	String predefining several NetHack
 .br
 	options.
 .br
 
-In addition, SHOPTYPE is used in debugging (wizard) mode.
+If the same option is specified in both NETHACKOPTIONS and .nethackrc,
+the value assigned in NETHACKOPTIONS takes precedence.
+.br
+
+SHOPTYPE and SPLEVTYPE can be used in debugging (wizard) mode.
+.br
+DEBUGFILES can be used if the program was built with 'DEBUG' enabled.
 .SH "SEE ALSO"
 .PP
 dgn_comp(6), lev_comp(6), recover(6)