texi2pod.pl: Handle @samp and @url inside verbatim blocks.

contrib:
	* texi2pod.pl: Handle @samp and @url inside verbatim blocks.
	Handle @heading.  Handle enumerated lists with starting numbers
	and extra headings.

gcc:
	* doc/include/gpl_v3.texi: Update for manpage generation.
	* doc/gcc.texi, doc/gccint.texi: Include gpl_v3.texi instead of
	gpl.texi.
	* doc/sourcebuild.texi: Document gpl_v3.texi as well as gpl.texi.
	* Makefile.in (TEXI_GCC_FILES, TEXI_GCCINT_FILES): Include
	gpl_v3.texi instead of gpl.texi.
	(gpl.pod): New.

gcc/fortran:
	* gfortran.texi: Include gpl_v3.texi instead of gpl.texi
	* Make-lang.in (GFORTRAN_TEXI): Include gpl_v3.texi instead of
	gpl.texi.

gcc/java:
	* gcj.texi: Include gpl_v3.texi instead of gpl.texi
	* Make-lang.in (TEXI_JAVA_FILES): Include gpl_v3.texi instead of
	gpl.texi.

From-SVN: r133794