Change maintainer to FSF and remove loads of compatibility cruft.

Change maintainer to FSF and remove loads of compatibility cruft.
(tcl-using-emacs-19, tcl-using-emacs-19-23, tcl-using-xemacs-19)
(tcl-version, tcl-maintainer, tcl-use-hairy-comment-detector): Remove.
(tcl-mode-map): Remove bindings for tcl-beginning-of-defun,
tcl-end-of-defun, tcl-mark-defun, tcl-indent-for-comment,
tcl-submit-bug-report.
(tcl-mode-syntax-table): Leave \f alone.
(inferior-tcl-mode-map): Remove bindings for tcl-beginning-of-defun,
tcl-end-of-defun, tcl-submit-bug-report.
(tcl-xemacs-menu): Fix up and pass it directly to easymenu.
(tcl-add-emacs-menu): Remove.
(tcl-fill-mode-map, tcl-fill-inferior-map): Moved into the defvar.
(tcl-keyword-list): Add `chain'.
(tcl-font-lock-syntactic-keywords): New variable.
(tcl-pps-has-arg-6): Remove.
(tcl-internal-beginning-of-defun, tcl-internal-end-of-defun)
(tcl-internal-mark-defun): Remove.
(tcl-set-proc-regexp, tcl-set-font-lock-keywords): Use regexp-opt.
(tcl-mode): Use define-derived-mode.  Simplify.
Set comment-indent-function.
(tcl-indent-command): Use line-beginning-position and comment-indent.
(tcl-calculate-indent): Renamed from calculate-tcl-indent.
(tcl-indent-line): Use tcl-calculate-indent.
(tcl-indent-exp): Renamed from indent-tcl-exp.  Use new names.
(tcl-add-log-defun): Renamed from add-log-tcl-defun.  Use match-string.
(tcl-filter): Use with-current-buffer, simplify.
(inferior-tcl-mode): Use define-derived-mode.
(tcl-hairy-in-comment): Renamed tcl-in-comment.
(tcl-simple-in-comment, tcl-in-comment): Removed.
(tcl-files-alist): New function.
(tcl-help-snarf-commands): Use it and return the result directly
rather than through a global variable.
(tcl-reread-help-files): Fix up the call to tcl-help-snarf-commands.
(tcl-help-on-word): Provide the default value to completing-read.
(tcl-hilit): Remove.
(tcl-hashify-buffer, tcl-popup-menu): Simplify.
(tcl-comment-indent): New function.
(tcl-submit-bug-report): Remove.
(tcl-uncomment-region, tcl-indent-for-comment, add-log-tcl-defun)
(indent-tcl-exp, calculate-tcl-indent, tcl-beginning-of-defun)
(tcl-end-of-defun, tcl-mark-defun, tcl-mark): Redefine as aliases.