Merge 1812756 from trunk:

htpasswd: Don't fail in -v mode if password file is unwritable.
PR 61631.

Submitted by: rjung
Reviewed by: rjung, ylavic, covener


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1826887 13f79535-47bb-0310-9956-ffa450edef68