mod_authnz_ldap, mod_authn_dbd: Tidy up the code to expose authn parameters to...

mod_authnz_ldap, mod_authn_dbd: Tidy up the code to expose authn parameters to the environment. Improve portability to EBCDIC machines by using apr_toupper()

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@571798 13f79535-47bb-0310-9956-ffa450edef68