Merge 1781509 from trunk:

htpasswd: don't point to (unused) stack memory on output
to make static analysers happy.  PR 60634.

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


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1826886 13f79535-47bb-0310-9956-ffa450edef68