(defun mh-alias-insert-file (&optional alias)
"Return filename which should be used to add ALIAS.
-The value of the option `mh-alias-insert-file' is used if non-nil\;
+The value of the option `mh-alias-insert-file' is used if non-nil;
otherwise the value of the \"Aliasfile:\" profile component is used.
If the alias already exists, try to return the name of the file that
contains it."