(rfc822/parse-ascii-token): nil check for token-value

(rfc822/parse-ascii-token): check token instead of (cdr token).

(rfc822/parse-ascii-token): applied Shuhei KOBAYASHI
<shuhei@cmpt01.phys.tohoku.ac.jp>'s patch (cf. [tm-ja:1671])

(rfc822/parse-ascii-token): New function.
(rfc822/parse-word, rfc822/parse-local-part, rfc822/parse-sub-domain,
rfc822/parse-domain, rfc822/parse-at-domain, rfc822/parse-route,
rfc822/parse-route-addr, rfc822/parse-group, rfc822/parse-addresses):
Use function `rfc822/parse-ascii-token' instead of
`rfc822/parse-token'.

Don't use `equal' to compare strings.

(rfc822/non-qtext-char-list): new constant

Constant `rfc822/non-qtext-chars' was deleted.

(rfc822/wrap-as-quoted-string): new function

(mu-register/citation-name): use function `y-or-n-p'
(mu-register/citation-name-quietly): use function `y-or-n-p'

(mu-register/citation-name, mu-register/citation-name-quietly): use
function `tl:read-string' instead of `read-string'.

`(require 'pp)' was deleted.

Method `prefix-registered-quietly' was renamed to `prefix-register'.
Method `prefix-registered' was renamed to `prefix-register-verbose'.

(mu-register/get-citation-name): new implementation by macro

(mu-register/citation-name-quietly): new function: implementation of
`prefix-registered-quietly'

Method name of function `mu-register/citation-name' was changed.

(mu-register/save-to-file): new implementation

(mu-register/registration-symbol): new variable: to specify symbol
name of citation-name database.

(mu-register/save-to-file): modified to use variable
`mu-register/registration-symbol'.

Comments were modified.

use function `set-alist'.

Comments were translated from Japanese to English.

Initial revision

(rfc822/extract-address-components): New function

���� rfc822/parse-group �� comma �� let ��������������������������

���� rfc822/parse-group ���������� `:' �� `colon' ����������
��XEmacs �� compile ������������������������

tm-edit.el �������� rfc822/get-header-string-except ����������

���� rfc822/linear-white-space-regexp, rfc822/quoted-pair-regexp,
rfc822/qtext-regexp, rfc822/quoted-string-regexp ������������

���� rfc822/field-top-regexp ������������

���� rfc822/field-name-regexp,
���� rfc822/field-end, rfc822/get-field-body,
���� rfc822/strip-quoted-pair, rfc822/strip-quoted-string,
���� rfc822/unfolding-string ������������

Initial revision