* mh-alias.el (mh-alias-gecos-name): Use replace-regexp-in-string

* mh-alias.el (mh-alias-gecos-name): Use replace-regexp-in-string
instead of mh-replace-in-string as mh-replace-in-string was replaced
by a more appropriate defsubst in mh-xemacs.el.

* mh-comp.el: Require cleanup, wrap compiler-shushing defvars with
eval-when-compile.
(mh-file-is-vcard-p): Removed redundant test.

* mh-customize.el: Require cleanup, wrap compiler-shushing defvars
with eval-when-compile.
(mh-adaptive-cmd-note-flag, mh-invisible-header-fields)
(mh-invisible-header-fields-default): Add forward definitions.
(mh-invisible-header-fields-default): Alphabetize.

* mh-e.el: Require cleanup, wrap compiler-shushing defvars with
eval-when-compile.
(mh-thread-scan-line-map-stack, tool-bar-mode): Delete unused
variables.
(mh-colors-available-p): Just call display-color-cells. It's on all
supported Emacsen (and defaliased on XEmacs).

* mh-funcs.el: mh-inc.el: mh-init.el: Wrap compiler-shushing defvars
* with eval-when-compile.

* mh-identity.el: Don't need (mh-require-cl).

* mh-index.el: Don't need to load executable any more.

* mh-mime.el: Wrap compiler-shushing defvars with eval-when-compile.
(mh-have-file-command): Initialize variable to 'undefined. Add
docstring. Update function of same name accordingly. Also don't need
to load executable any more.
(mh-mime-content-types): Delete.
(mh-minibuffer-read-type): Prompt user for type if mh-file-mime-type
returns application/octet-stream. Assume we have mailcap-mime-types.
(mh-mime-display): Update error message.

* mh-seq.el: Require cleanup, and wrap compiler-shushing defvars with
eval-when-compile.

* mh-utils.el: Require cleanup, and wrap compiler-shushing defvars
with eval-when-compile.
(mh-clean-msg-header): Don't set after-change-functions to nil.
(mh-replace-in-string): Remove. Create defsubst in mh-xemacs.el
instead.