Issue 51042 - switch from c_rehash to openssl rehash
    
    Bug Description:
        389-ds-base depends on an additional Fedora package openssl-perl for
        the /usr/bin/c_rehash script, which just wraps /usr/bin/openssl and
        drags in a perl interpreter in the process. The openssl program
        contains a builtin 'rehash' subcommand that does the same thing,
        only faster and with fewer dependencies. And openssl developers
        refer to c_rehash as a fallback and suggest it might be feasible to
        remove it entirely.
    
    Fix Description:
        Switch all call sites and inline documentation to refer to `openssl
        rehash`, and drop the unneeded dependency from the spec file.
        One less dependency on perl!
    
    Fixes https://pagure.io/389-ds-base/issue/51042
    
    Author: eschwartz