Change `Server` HTTP header to say CouchDB instead of MochiWeb, and add a `Cache-Control: must-revalidate` header to all JSON and attachment responses.
Change `Server` HTTP header to say CouchDB instead of MochiWeb, and add a `Cache-Control: must-revalidate` header to all JSON and attachment responses.

git-svn-id: f1325d765b86db8550d2145f7bc93fd34e7a3d5a@671151 13f79535-47bb-0310-9956-ffa450edef68

cloudant/bigcouch,Gussy/bigcouch,bittorrent/bigcouch,davidcoallier/bigcouch,fkaempfer/couchdb,Asquera/bigcouch,fkaempfer/couchdb,davidcoallier/bigcouch,KlausTrainer/bigcouch,cloudant/bigcouch,kofron/bigcouch,Asquera/bigcouch,benoitc/bigcouch,bittorrent/bigcouch,Gussy/bigcouch,breezjw/bigcouch,Asquera/bigcouch,KlausTrainer/bigcouch,kofron/bigcouch,kofron/bigcouch,cloudant/bigcouch,fkaempfer/couchdb,breezjw/bigcouch,benoitc/bigcouch,benoitc/bigcouch,benoitc/bigcouch,andrejb/cloudant_bigcouch,Asquera/bigcouch,PerilousApricot/bigcouch,KlausTrainer/bigcouch,davidcoallier/bigcouch,Asquera/bigcouch,benoitc/couchit_experiment,andrejb/cloudant_bigcouch,bittorrent/bigcouch,davidcoallier/bigcouch,georgemarshall/bigcouch,andrejb/cloudant_bigcouch,linearregression/bigcouch,benoitc/bigcouch,georgemarshall/bigcouch,bittorrent/bigcouch,cloudant/bigcouch,fkaempfer/couchdb,georgemarshall/bigcouch,benoitc/couchit_experiment,PerilousApricot/bigcouch,benoitc/couchit_experiment,breezjw/bigcouch,bittorrent/bigcouch,breezjw/bigcouch,linearregression/bigcouch,georgemarshall/bigcouch,cloudant/bigcouch,benoitc/bigcouch,davidcoallier/bigcouch,PerilousApricot/bigcouch,breezjw/bigcouch,kofron/bigcouch,andrejb/cloudant_bigcouch,Gussy/bigcouch,breezjw/bigcouch,davidcoallier/bigcouch,linearregression/bigcouch,bittorrent/bigcouch,georgemarshall/bigcouch,Gussy/bigcouch,linearregression/bigcouch,PerilousApricot/bigcouch,andrejb/cloudant_bigcouch,georgemarshall/bigcouch,linearregression/bigcouch,linearregression/bigcouch,KlausTrainer/bigcouch,benoitc/couchit_experiment,cloudant/bigcouch,fkaempfer/couchdb,PerilousApricot/bigcouch,fkaempfer/couchdb,PerilousApricot/bigcouch,KlausTrainer/bigcouch,cloudant/bigcouch,kofron/bigcouch,kofron/bigcouch,andrejb/cloudant_bigcouch,andrejb/cloudant_bigcouch,KlausTrainer/bigcouch,benoitc/couchit_experiment,Gussy/bigcouch,Asquera/bigcouch,Gussy/bigcouch,linearregression/bigcouch