Add config directive for alternative / additional ccname env var #123
Description
mod_auth_gssapi currently sets the KRB5CCNAME variable in the request environment
when delegation is used.
This is not sufficient e.g. if you are proxying the request over AJP and want to convey the ccname,
you need a variable that starts with "AJP_".
Add a directive that will allow an alternative envvar(s) to be specified. Suggestion:
GssapiDelegCcacheEnvVar varname [varname ...]
Defaulting to the existing behaviour.