* support/htpasswd.c (usage): Fix bcrypt round maximum.

* docs/manual/programs/htpasswd.xml: Document that bcrypt rounds are
capped at 17.

PR: 62078


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1846254 13f79535-47bb-0310-9956-ffa450edef68