[svn] * configure.in: Look for perl and pod2man and make substitutions.

[svn] * configure.in: Look for perl and pod2man and make substitutions.

* Makefile.in (install): Do install.man if we have pod2man.

* Makefile.in: Make wget man page and install it if we have pod2man.  Added some
  missing '$(srcdir)/'s.  Added missing dependencies on install targets
  (allowing you to just do `make install' rather than forcing you to do `make &&
  make install').  Also, Makefile rules should always use output file parameters
  if available rather than redirecting stdout with '>', or you falsely satisfy
  dependencies if the tool you're running is missing or fails -- fixed call of
  texi2pod.pl that did this wrong.

* texi2pod.pl: Removed from CVS.  Now automatically generated.

* texi2pod.pl.in: This new file is processed into texi2pod.pl, getting the
  appropriate path to the Perl 5+ executable on this system and becoming
  executable (CVS files, by contrast, don't arrive executable).