Revert "added; support for awaitdata query option"

This reverts commit 902038260da7b2f23d339a4ac9896da4040fa24b.

Will be 3.7
Revert "added; mongos failover support"

This reverts commit 76b10db1ce2c7542242a86aa25e139c5c8f094f1.

Will be in 3.7
fixed; populated streams

closes #1411