Mathieu Duponchelle authored Jun 19, 2019 and Mathieu Duponchelle committed Jun 19, 2019

Regression introduced by b4bdcf15

This commit prevents the handshake from reaching dtlsdec when
the receive state of the receive bin is set to DROP (for example
when transceivers are sendonly).

This preserves the intent of the commit, by blocking the bin
at its sinks until the receive state is no longer BLOCK, but
makes sure the handshake still goes through, by only dropping
data at the src pads, as was the case before.