tty statuslines:3

Implement the 'statuslines' option for tty.  2 and 3 line status are
similar to curses.  Tty's version doesn't include insertion of extra
spaces for enhanced readability, or ignoring 'showexp' when space is
needed for other fields, or right justifying 'score' and suppressing
it when there isn't room for the entire number.  It continues to have
abbreviated condition and encumbrance descriptions that curses lacks
which get used when the normal ones take up too much space.

'statuslines' can be set with 'O' so it is feasible to switch back
and forth between 2 and 3 lines on the fly.  But only if the display
is at least 25 lines (actually ROWNO+4) or else CLIPPING is enabled
at build time.

This fixes the bug where after resorting to abbreviated condition
values it sometimes (always?) wouldn't switch back after more room
became available.  Abbreviated encumbrance values had problems too
(lack of leading space and not changing value if encumbrance changed
to anything other than unencumbered) and this fixes that as well.

doc/Guidebook.mn

@@ -1,4 +1,4 @@
-.\" $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.301 $ $NHDT-Date: 1553480404 2019/03/25 02:20:04 $
+.\" $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.302 $ $NHDT-Date: 1553858473 2019/03/29 11:21:13 $
 .\"
 .\" This is an excerpt from the 'roff' man page from the 'groff' package.
 .\" NetHack's Guidebook.mn currently does *not* adhere to these guidelines.
@@ -3657,7 +3657,7 @@ up (default yes).
 .lp statuslines
 Number of lines for traditional below-the-map status display.
 Acceptable values are 2 and 3 (default is 2).
-Curses interface only.
+Curses and tty interfaces only.
 .lp "term_cols\ \ \fIand\fP"
 .lp term_rows
 Curses interface only.