S3rver: Add `declare namespace S3rver`
S3rver: Add `declare namespace S3rver`

georgemarshall/DefinitelyTyped,rolandzwaga/DefinitelyTyped,AgentME/DefinitelyTyped,magny/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,magny/DefinitelyTyped,AgentME/DefinitelyTyped,AgentME/DefinitelyTyped,georgemarshall/DefinitelyTyped,borisyankov/DefinitelyTyped,AgentME/DefinitelyTyped,rolandzwaga/DefinitelyTyped,georgemarshall/DefinitelyTyped,one-pieces/DefinitelyTyped,mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,markogresak/DefinitelyTyped