* wl-summary.el (wl-summary-print-destination):

* wl-summary.el (wl-summary-print-destination):
Duplicate folder string to avoid putting text-property on
original string.

* wl-refile.el (wl-refile-get-field-value): New function.
(wl-refile-evaluate-rule): New function;
Evaluate refile rule recursively.
(wl-refile-guess-by-rule): Use wl-refile-evaluate-rule.
* wl-summary.el (wl-summary-auto-refile-check-refile-rule-alist-subr):
New function; Check existence of a target folder recursively.
(wl-summary-auto-refile-check-refile-rule-alist):
Use wl-summary-auto-refile-check-refile-rule-alist-subr.