Merged in changes from v4.32.

Merged in changes from v4.32.
 After 4.23 and: After 4.24:
(cperl-contract-levels): Restore position.
(cperl-beautify-level): Likewise.
(cperl-beautify-regexp): Likewise.
(cperl-commentify): Rudimental support for length=1 runs
(cperl-find-pods-heres): Process 1-char long REx comments too /a#/x
 After 4.25:
(cperl-commentify): Was recognizing length=2 "strings" as length=1.
(imenu-example--create-perl-index): Was not enforcing
syntaxification-to-the-end.
(cperl-invert-if-unless): Allow `for', `foreach'.
(cperl-find-pods-heres): Quote `cperl-nonoverridable-face'.
Mark qw(), m()x as indentable.
(cperl-init-faces): Highlight `sysopen' too.
Highlight $var in `for my $var' too.
(cperl-invert-if-unless): Was leaving whitespace at end.
(cperl-linefeed): Was splitting $var{$foo} if point after `{'.
(cperl-calculate-indent): Remove old commented out code.
Support (primitive) indentation of qw(), m()x.
 After 4.26:
(cperl-problems): Mention `fill-paragraph' on comment. \"" and
q [] with intervening newlines.
(cperl-autoindent-on-semi): New customization variable.
(cperl-electric-semi): Use `cperl-autoindent-on-semi'.
(cperl-tips): Mention how to make CPerl the default mode.
(cperl-mode): Support `outline-minor-mode'.  From Mark A. Hershberger.
(cperl-outline-level): New function.
(cperl-highlight-variables-indiscriminately): New customization var.
(cperl-init-faces): Use `cperl-highlight-variables-indiscriminately'.
From Sean Kamath <kamath@pogo.wv.tek.com>.
(cperl-after-block-p): Support CHECK and INIT.
(cperl-init-faces, cperl-short-docs): Likewise and "our".
From Doug MacEachern <dougm@covalent.net>.
 After 4.27:
(cperl-find-pods-heres): Recognize \"" as a string.
Mark whitespace between q and [] as `syntax-type' => `prestring'.
Allow whitespace between << and "FOO".
(cperl-problems): Remove \"" and q [] with intervening newlines.
Mention multiple <<EOF as unsupported.
(cperl-highlight-variables-indiscriminately): Doc misprint fixed.
(cperl-indent-parens-as-block): New configuration variable.
(cperl-calculate-indent): Merge cases of indenting non-BLOCK groups.
Use `cperl-indent-parens-as-block'.
(cperl-find-pods-heres): Test for =cut without empty line instead of
complaining about no =cut.
(cperl-electric-pod): Change the REx for POD from "\n\n=" to "^\n=".
(cperl-find-pods-heres): Likewise.
(cperl-electric-pod): Change `forward-sexp' to `forward-word':
POD could've been marked as comment already.
(cperl-unwind-to-safe): Unwind before start of POD too.
 After 4.28:
(cperl-forward-re): Throw an error at proper moment REx unfinished.
 After 4.29:
(x-color-defined-p): Make an extra case to peacify the warning.
Toplevel: `defvar' to peacify the warnings.
(cperl-find-pods-heres): Could access `font-lock-comment-face' in -nw.
No -nw-compile time warnings now.
(cperl-find-tags): TAGS file had too short substring-to-search.
Be less verbose in non-interactive mode
(imenu-example--create-perl-index): Set index-marker after name
(cperl-outline-regexp): New variable.
(cperl-outline-level): Made compatible with `cperl-outline-regexp'.
(cperl-mode): Made use `cperl-outline-regexp'.
 After 4.30:
(cperl-find-pods-heres): =cut the last thing, no blank line, was error.
(cperl-outline-level): Make start-of-file same level as `package'.
 After 4.31:
(cperl-electric-pod): `head1' and `over' electric only if empty.
(cperl-unreadable-ok): New variable.
(cperl-find-tags): Use `cperl-unreadable-ok', do not fail
on an unreadable file.
(cperl-write-tags): Use `cperl-unreadable-ok', do not fail
on an unreadable directory.