Cleanup, added comments about fragmentation.
Cleanup, added comments about fragmentation.

Cleanup, added comments about fragmentation. Restrict sends to 65
kilobytes because we will fragmentation if MTU path is too small or
allow IP-layer fragmentation up to 2 kilobytes.

xCoreDev/vanillacoin,xCoreDev/vcash,sum01/vcash,openvcash/vcash,xCoreDev/vcash,openvcash/vcash,xCoreDev/vanillacoin,sum01/vcash