(number): Handle `Nov 11 1996' example; see Risks Digest 20.55
http://catless.ncl.ac.uk/Risks/20.55.html#subj18
(1999-08-27)
(<stdio.h>): Include only if testing.
(ISUPPER): Remove.
(ISLOWER, PC): New macros.
(<string.h>): Include if HAVE_STRING_H, not USG.
(bcopy): Remove.
(yymaxdepth, ..., yycheck): Don't bother to redefine, since we assume
bison.
(EPOCH_YEAR): Renamed from EPOCH.
(table): Renamed from TABLE.
(meridian): Now an anonymous enum.
(struct parser_control): New type.
(YYLEX_PARAM, YYPARSE_PARAM, YYSTYPE): New macros.
(yyInput, ..., yyRelYear): Migrated into struct parser_control.
(%pure_parser): Added, so that the parser is pure.
(%union): Removed; the type is now just plain int.
All %type directives removed.
(tLOCAL_ZONE): New %token.
(month_day_table): Renamed from MonthDayTable.
(gmtime, localtime, mktime, time): Declare only if not defined.
(meridian_table): New table.
(dst_table): New table.
(units_table): renamed from UnitsTable.
(relative_time_table): Renamed from OtherTable.
(time_zone_table): Renamed from TimezoneTable. Modernized data.
(military_table): Renamed from MilitaryTable.
(to_hour): Renamed from ToHour.
(to_year): Renamed from ToYear.
(lookup_zone): New function.
(LookupWord): Renamed from lookup_word.
Use lookup_zone for time zones.
(yylex): Now reentrant. All callers changed.
(get_date): Add support for local time zone abbreviations.
Make it reentrant.
Change from escape_quoting_style to locale_quoting_style.
(argmatch_invalid): Use new quotearg_style primitive for simplicity.
Also, use ARGMATCH_QUOTING_STYLE to quote, instead of quoting ourselves.
(_): New macro.
(quoting_style_args, quoting_style_v, quotearg_buffer): Add support
for locale_quoting_style, using _("`") and _("'") for open and close
quote symbols.
Do not quote spaces in escape_quoting_style.
(quotearg_n_style, quotearg_style): New functions.
`yesterday,' `today,' and `now' rather than tMINUTE_UNIT. Of course
with correspondingly smaller numbers for tomorrow and yesterday.
This change does not change the way the code works, since the
grammar rules for the two symbols are analogous.
