Fix minor Y10k bugs.

* lisp/arc-mode.el (archive-unixdate):
* lisp/autoinsert.el (auto-insert-alist):
* lisp/calc/calc-forms.el (math-this-year):
* lisp/gnus/nnweb.el (nnweb-google-parse-1):
* lisp/emacs-lisp/copyright.el (copyright-current-year)
(copyright-update-year, copyright):
* lisp/tar-mode.el (tar-clip-time-string):
* lisp/time.el (display-time-update):
Don't assume years have 4 digits.
Display archive errors in the echo area instead of inserting to the file buffer.

* lisp/arc-mode.el (archive-extract-by-stdout): Change arg STDERR-FILE
to STDERR-TEST that can be a regexp matching a successful output.
Create a temporary file and redirect stderr to it.  Search for
STDERR-TEST in the stderr output and display it in the echo area
if no match is found.
(archive-extract-by-file): New function like
`archive-extract-by-stdout' but extracting archives to files
and looking for successful matches in stdout.  Function body is
mostly copied from `archive-rar-extract'.
(archive-rar-extract): Use `archive-extract-by-file'.
(archive-7z-extract): Use `archive-extract-by-stdout'.
* lisp/arc-mode.el (archive-summarize): Let-bind `buffer-file-truename'
to nil around the call to `add-text-properties' to prevent
directory time modification by lock_file. 
* lisp/tar-mode.el (tar-summarize-buffer): Idem.
Cleanup uses of "-hooks".
* doc/emacs/custom.texi (Hooks):
* doc/lispref/hooks.texi (Standard Hooks): Clarify that -hooks is deprecated.

* lisp/gnus/nndiary.el (nndiary-request-create-group-functions)
(nndiary-request-update-info-functions)
(nndiary-request-accept-article-functions):
* lisp/gnus/gnus-start.el (gnus-subscribe-newsgroup-functions):
* lisp/cedet/semantic/db-file.el (semanticdb-save-database-functions):
* lisp/cedet/semantic/lex.el (semantic-lex-reset-functions):
* lisp/cedet/semantic/edit.el (semantic-change-functions)
(semantic-edits-new-change-functions)
(semantic-edits-delete-change-functions)
(semantic-edits-reparse-change-functions):
* lisp/htmlfontify.el (hfy-post-html-hook):
* lisp/filesets.el (filesets-cache-fill-content-hook):
* lisp/arc-mode.el (archive-extract-hook):
* lisp/progmodes/cc-mode.el (c-prepare-bug-report-hook):
* lisp/net/rcirc.el (rcirc-sentinel-functions)
(rcirc-receive-message-functions, rcirc-activity-functions)
(rcirc-print-functions):
* lisp/net/dbus.el (dbus-event-error-functions):
* lisp/emacs-lisp/eieio.el (eieio-pre-method-execution-functions):
* lisp/emacs-lisp/checkdoc.el (checkdoc-style-functions)
(checkdoc-comment-style-functions): Don't use "-hooks" suffix.

* lisp/term/sun.el (sun-raw-prefix-hooks):
* lisp/mail/sendmail.el (mail-yank-hooks):
* lisp/mh-e/mh-letter.el (mh-yank-hooks): Use make-obsolete-variable.
Use new names for hooks rather than obsolete aliases

* lisp/cedet/semantic/lex-spp.el (semantic-lex-spp-lex-text-string):
* lisp/cedet/semantic/util.el (semantic-describe-buffer):
* lisp/cedet/semantic/bovine/c.el (semantic-c-parse-lexical-token)
(semantic-default-c-setup):
* lisp/emacs-lisp/eieio-datadebug.el (eieio-debug-methodinvoke):
* lisp/gnus/gnus-diary.el (nndiary-request-create-group-functions)
(nndiary-request-update-info-functions)
(gnus-subscribe-newsgroup-functions)
(nndiary-request-accept-article-functions):
* lisp/net/tramp-gvfs.el (tramp-gvfs-dbus-event-error):
Use new names for hooks rather than obsolete aliases.

* lisp/arc-mode.el:
* lisp/emacs-lisp/checkdoc.el: Related comments.

* etc/NEWS: Related markup.
Update copyright notices for 2013.