Accept --report-file=FILE to override the default `.output' filename.

* NEWS (2.3a+): Mention.
* doc/bison.texinfo (Bison Options): Add an entry.
* src/files.c (compute_output_file_names): Don't override
spec_verbose_file if already set.
* src/getargs.c (usage): Document --report-file.
(REPORT_FILE_OPTION): New anonymous enum member.
(long_options): Add entry for it.
(getargs): Add case for it setting spec_verbose_file.

* build-aux/cross-options.pl: Don't record a short option just because
there's an arg.
* doc/.cvsignore: Add yacc.1.

doc/.cvsignore

@@ -13,11 +13,12 @@ bison.ps
 bison.toc
 bison.tp
 bison.vr
+cross-options.texi
+Makefile.in
 refcard.dvi
 refcard.log
 refcard.ps
-Makefile.in
 *.info*
 stamp-vti
 version.texi
-cross-options.texi
+yacc.1

doc/bison.1

@@ -107,6 +107,9 @@ also produce a header file
 \fB\-r\fR, \fB\-\-report\fR=\fITHINGS\fR
 also produce details on the automaton
 .TP
+\fB\-\-report\-file\fR=\fIFILE\fR
+write report to FILE
+.TP
 \fB\-v\fR, \fB\-\-verbose\fR
 same as `\-\-report=state'
 .TP

doc/bison.texinfo

@@ -7827,6 +7827,9 @@ Implies @code{state} and augments the description of the automaton with
 the full set of items for each state, instead of its core only.
 @end table
 
+@item --report-file=@var{file}
+Specify the @var{file} for the verbose description.
+
 @item -v
 @itemx --verbose
 Pretend that @code{%verbose} was specified, i.e., write an extra output