Use new style backquotes

* sha1-el.el (sha1-F0, sha1-F1, sha1-F2, sha1-F3, sha1-S1) (sha1-S5,
sha1-S30, sha1-OP, sha1-add-to-H): Use new style backquotes.

* md5-el.el: Dto.

* md4.el (md4-make-step): Dto.

* hmac-def.el (define-hmac-function): Dto.

* hex-util.el (hex-char-to-num, hex-char-to-char): Dto.

* eword-encode.el (make-ew-rword, ew-rword-text) (ew-rword-charset,
ew-rword-encoding, ew-rword-type): Dto.
Proper ChangeLog entry for old backquotes patch by HAMANO Kiyoto.
Use new style backquotes in md4.el

	* md4.el (md4-make-step): Use new style backquotes.
Merge from my local repository
Abolish customization for starttls package
Broken parameter encoders are added
* mel-q.el (quoted-printable-num-to-raw-byte-char): Enclose with eval-and-compile().
Support built-in GnuTLS for STARTTLS connection.
smtp.el (smtp-open-connection): Raise error when open connection function failed.
mime-parse.el (mime-parse-message): Use mime-read-Content-Type instead of mime-parse-Content-Type.
Merged from upstream
Fix wrong ChangeLog entry
tm-eword::string-to-ruled-words is introduced with Emacs23 specific routine.
Re-encode ChangeLog with ctext
ew-find-string-rule is introduced with Emacs23 specific routine.
eword-encode.el (ew-find-charset-rule): Define only when needed.
mel-q-ccl.el (q-encoding-ccl-decode-string): Remove duplicate definition for Emacs 23.1.
std11.el: Workaround for incorrect folding.
mime-def.el (mime-charset-decode-string, mime-charset-encode-string): New functions.
mailcap.el has been removed.