update tutorial to describe Simulator::Stop
fix formatting for CoDel chapter
remove outdated reference to statistics chapter
Bug 1972: documentation to clarify the behavior with repeated argument
conditional include of fd-net-device for lte module
silence uninitialized variable warning for unused member
rescan remaining bindings
Added tag ns-3.21 for changeset fa4be182ef17
update RELEASE_NOTES for new release version
update CHANGES.html for new release version
revert accidental commit of debugging code in changeset 55f1b7dc037e
Bug 1991 - PcapFileWrapper::CaptureSize attribute (snaplen) has no effect.
Bug 1983 - FlowMonitor returns containers copies instead of references
Example ht-wifi-network contains old random variable syntax
Avoid forward declaration if not needed - silence Eclipse warning