Do not overwrite X-CouchDB-Requested-Path
Do not overwrite X-CouchDB-Requested-Path

Repeated rewrites would replace the initial value of
X-CouchDB-Requested-Path.

Fixes: COUCHDB-1442

KlausTrainer/couchdb-couch,apache/couchdb-couch,cloudant/couchdb-couch,smithsz/couchdb-couch,smithsz/couchdb-couch,ngpestelos/couchdb-couch,ngpestelos/couchdb-couch,smithsz/couchdb-couch,fkaempfer/couchdb,apache/couchdb-couch,alanning/couchdb-couch,fkaempfer/couchdb,fkaempfer/couchdb,KlausTrainer/couchdb-couch,cloudant/couchdb-couch,KlausTrainer/couchdb-couch,cloudant/couchdb-couch,apache/couchdb-couch,fkaempfer/couchdb,alanning/couchdb-couch,fkaempfer/couchdb,alanning/couchdb-couch,fkaempfer/couchdb,ngpestelos/couchdb-couch