```validate_doc_update``` moved from views to root
```validate_doc_update``` moved from views to root

Signed-off-by: Alexander Shorin <287dfd97d2274fe201ae7191a244ba25e475e13a@apache.org>

KimStebel/couchdb-documentation,micah/couchdb-documentation,robertkowalski/couchdb-documentation,cloudant/couchdb-documentation,KimStebel/couchdb-documentation,andywenk/couchdb-documentation,micah/couchdb-documentation,micah/couchdb-documentation,KimStebel/couchdb-documentation,robertkowalski/couch-doc-test,robertkowalski/couch-doc-test,andywenk/couchdb-documentation,kxepal/couchdb-documentation,kxepal/couchdb-documentation,kxepal/couchdb-documentation,robertkowalski/couchdb-documentation,andywenk/couchdb-documentation,robertkowalski/couch-doc-test,cloudant/couchdb-documentation,robertkowalski/couchdb-documentation