Ensure event propagation in ThroughputCounter.

Unbreaks connection counter.

(cherry picked from commit f8da27e1e66d17c99ba41131a8d53b958a575aab)
Ensure null-byte delimiter for GELF TCP inputs.

(cherry picked from commit 0a7a1d36b0fb0a3fd914047d634160a0d85f6755)