* modules/aaa/mod_auth_digest.c: Remove "weird" override of AuthName

* modules/aaa/mod_auth_digest.c: Remove "weird" override of AuthName
  directive, which adds complexity for little benefit (avoids putting
  20 bytes through SHA1 for each auth attempt).
  (set_realm): Remove function.
  (gen_nonce_hash): Create the nonce hash here from scratch.
  (create_digest_dir_config): Always allocate a config struct.
  Remove unused dir_name field from digest_config_rec.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
GitHub: PR #661

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1935945 13f79535-47bb-0310-9956-ffa450edef68