common connection string kvs

[brett19]

In the previous discussions for connection strings, we discussed unifying the possible options that can be passed with a connection string w.r.t. their names and default values. We should finish that discussion and merge it to be part of the connection-string RFC document.

[mnunberg]

For better or worse, the connection string options in libcouchbase are fairly widespread. The current reference can be found in the C documentation: http://developer.couchbase.com/documentation/server/4.0/sdks/c-2.4/options.html