Changes to troffcvt distribution for release 1.02.

setget.c:
Prior to this version, indent, page offset, line length, title length
and line spacing were clipped for purposes of writing an output value,
but the actual parameter value was stored internally.  Now the internal
value is clipped, too.  This means, for instance, that the internal
indent is never negative.

The -mac option to troff2rtf/tc2rtf was ambiguous (was intended to select
Macintosh character set, could be taken as "read macro package "ac").  Changed
troff2rtf/tc2rtf to take -cs charset option, where charset is ansi, mac, pc,
pca.  Uglier but unambiguous.

rtf-fonts (for tc2rtf) has a few more entries in it, for the \pc
character set, courtesy Dave Davey.

The value of the split/join option for tc2text is now split, not join.
This makes it easier to use for viewing on terminals and sending mail.
The -split option also now takes a following number to specify the split
length.  (Either -split30 or -split 30 are allowable.)

tc2text tries to draw horizontal lines by putting out '-' characters now.

General: some lint fluff taken out.

Handling of -me's .(x and .)x macros was botched, which turned out to be...
Macro body scanning was broken: the check for the end-of-body sequence
terminated when the sequence was matched, but did not check that it was
at the end of the input line.  So "..." would match "..", for instance,
when it shouldn't have.

More special chars added to rtf-spec-mac.
