* autoheader.sh: s/-eq/=/.
Uniform ordering of variable initializations, option handling.
Don't use quotes where useless (foo=$1, not foo="$1").
Propagate `run_m4' and `run_m4f'.
Use `$0' in --help.
* autoconf.sh: Likewise.
* autoreconf.sh: Likewise.
* autoupdate.sh: Likewise.
* ifnames.sh: Likewise.
* autoupdate.m4: Small bug: at the end `dnl' is disabled, so use
`m4_dnl'.
No need for foo="`bar`", foo=`bar` is fine.
Simplify ${foo} and ${1} into $foo and $1.
* acgeneral.m4 (ac_LF_and_DOT): Remove the double quotes.
* acspecific.m4 (AC_PROG_CC_C_O, AC_PROG_F77_C_O): Likewise.
* autoconf.sh: Likewise.
* autoheader.sh: Likewise.
* autoreconf.sh: Likewise.
* autoupdate.sh: Likewise.
* ifnames.sh: Remove all the code and messages related to
AC_MACRODIR, since ifnames is not related to macros in anyway.
Fix the --version of all the executables.
* Makefile.am (editsh, editpl): Substitute also PACKAGE and
VERSION.
* autoconf.sh (version): New string.
(--version): Use it.
(--help) Output on stdout, not stderr.
* autoheader.sh: Likewise.
* autoreconf.sh: Likewise.
* autoscan.pl: Likewise.
* autoupdate.sh: Likewise.
* ifnames.sh: Likewise.
