nethack man page updates

- as requested by ESR, remove the use of parentheses from the usage
summary, it confused some man page conversion tool he has
- updated documentation for the -p option to mention the word "role"
so anyone search for role in the man page will still find it
- removed use of .UC, it is listed as deprecated in all the current man
documentation I could find, when it was even documented at all
- other minor spelling and formatting (hyphenation) changes

doc/nethack.6

@@ -1,5 +1,4 @@
-.TH NETHACK 6 "9 August 2002"
-.UC 4
+.TH NETHACK 6 "6 March 2004"
 .SH NAME
 nethack \- Exploring The Mazes of Menace
 .SH SYNOPSIS
@@ -15,7 +14,7 @@ nethack \- Exploring The Mazes of Menace
 ]
 [
 .B \-p
-.I profession (role)
+.I profession
 ]
 [
 .B \-r
@@ -46,7 +45,7 @@ nethack \- Exploring The Mazes of Menace
 ]
 [
 .B \-p
-.I profession (role)
+.I profession
 ]
 [
 .B \-r
@@ -57,6 +56,8 @@ nethack \- Exploring The Mazes of Menace
 ]
 .ad
 .hy 14
+.\" Make sure path is not hyphenated below
+.hw nethackdir
 .SH DESCRIPTION
 .PP
 .I NetHack
@@ -77,7 +78,7 @@ To win the game (as opposed to merely playing to beat other people's high
 scores) you must locate the Amulet of Yendor which is somewhere below
 the 20th level of the dungeon and get it out.
 Nobody has achieved this yet; anybody who does will probably go down
-in history as a hero among heros.
+in history as a hero among heroes.
 .PP
 When the game ends, whether by your dying, quitting, or escaping
 from the caves,
@@ -143,9 +144,9 @@ character's gender.  Any of the parts of the suffix may be left out.
 .PP
 .B \-p
 .I profession
-can be used to determine the character role.  You can specify either the
-male or female name for the character role, or the first three characters
-of the role as an abbreviation.
+can be used to determine the character profession, also know as the role.
+You can specify either the male or female name for the character role, or
+the first three characters of the role as an abbreviation.
 .B "\-p \@"
 has been retained to explicitly request that a random role be chosen.
 It may need to be quoted with a backslash (\\@) if @