Revert "canSendThrottled bugfix"

This reverts commit 9871214d1be8b5dfd1331c9728f6f5c5551e151a.
Revert "Almost fixed nextActionTime calculation"

This reverts commit f11005ad0fbe09344cacf5799e260af1c1307acd.
Revert "A bit more reasonable checks for full-packets-available case"

Justification: Semantics bug, see [gsoc2013] Transport Layer - Update 5
This reverts commit b62f911d317fdfb18f3285e44e4617e6c7196ebb.
Fixed the bug preserving the initial semantics state