Update the generated files related to the autoconf support for BSD db.

This closes SourceForge patch #101272.

Update the build structures to automatically detect the presence of BSD db,
including the proper name of the header file to include.  Has all the
expected niceties associated with yet-more-configure-options.  ;)

This checkin includes changes for non-generated files only; subsequent
checkin will catch those.

This is part of SourceForge patch #101272.

applies patch #101369 by Moshe Zadke
use explicit list of always safe characters instead of string.letters
add test case

                instead of four #if/#endif blocks.  This shortens the
                code and improves readability.

also initial static debug variable to 0

LE_MAGIC; it breaks on Tru64.

Since the application never gets to see the namespace abbreviation
used in the XML document, but some applications may need to know them,
we provide this method.

generated markup.

Don't be careless with the navigation icons!  We should use the blank
icon where there is not anyplace to go for a particular position in the
navigation bar.

operator associativity.

generated documents to the document index.

of the generated document to an external index.  These correspond to the
-up_url and -up_title parameters of LaTeX2HTML.

separate some of the ties between l2hinit.perl and python.perl.

Revamp the "title page" construction to allow more flexibility.

initialization with additional Perl files.  This can be given more
than once.

do not use mkdvi.sh or mkhtl.sh any more.

This slows down building all versions of the documentation, but if you are
only building one format, it does not matter.

portable.

Fix a couple of really minor markup nits.

Remove some of GCC's warning in -Wstrict-prototypes mode.

This closes SourceForge patch #101342.

expression next to a || expression; this is a readability-inspired
warning from GCC.

in Parser/grammar.c.

close SF patch #101354

according to the MS docs it enables exception-handling, and (according
to Alex Martelli <aleaxit@yahoo.com>) is needed to compile without
getting warnings from standard C++ library headers.  Apparently
it doesn't cause any problems with C code, so I haven't bothered
conditionalizing the use of /GX.

scripts as much as possible.

longer meaningful to a new user, since stdwin is long gone.

* deletes cache
* adds firstweekday and setfirstweekday functions that allow user to control
  which day of the week is first when displaying calendars
* adds month, week, calendar functions that return their results instead of
  printing them
* adds symbolic constants MONDAY, ..., SUNDAY so users need not remember the
  ordinal values of the weekdays