smb2: allow limiting in-flight data size/cnt

smb2: allow limiting in-flight data size/cnt

Allow limiting in-flight out or order data chunks per size or count.

Implemented for read and writes separately:

app-layer.protocols.smb.max-write-queue-size
app-layer.protocols.smb.max-write-queue-cnt
app-layer.protocols.smb.max-read-queue-size
app-layer.protocols.smb.max-read-queue-cnt

Backport note: Modified to support Rust 1.33 -- Jason Ish

(cherry picked from commit 4be8334c9e95cc520c9c6a63a98d6b160915d07f)