Merge 1710403 from trunk:

htpasswd/htdigest: Disable support for bcrypt on EBCDIC platforms.
apr-util's bcrypt implementation doesn't tolerate EBCDIC.

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


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1826892 13f79535-47bb-0310-9956-ffa450edef68