Allow 2Q to be configured as a drop-in replacement for LRU

Summary: Hot queue at 100% is equivalent to a simple Lru. Just relax the limit checks.

Reviewed By: therealgymmy

Differential Revision: D34259307

fbshipit-source-id: 94955dc0aae7d1f74e9e4a15fd92eb9e7b2b178a

Updating submodules

Summary:
GitHub commits:

facebook@52c3f37
facebook/fb303@d0f9136
facebook/fbthrift@7a07412
facebookarchive/fbzmq@5ee0e55
facebook/proxygen@3867cfc
facebook/wangle@2af9fa4
facebook/watchman@7840055
facebookexperimental/rust-shed@6bb3480
facebookincubator/katran@e80f34e
facebook/mvfst@31cadb5

Reviewed By: yns88

fbshipit-source-id: 6e66854eb84f453e61b9c99fe26d833bfe68e439