bugfix in fastack needless transfer

v5.4.10

reset fastack = 0 to prevent from sending needless data

v5.4.5

more accurate write block

v5.4.2

bug fix

v5.4.1

fix sendmmsg/recvmmsg compatibility issue for old linux kernel

v5.3.9

bug fix

v5.3.8

rename var

v5.3.7

proper error handling

synchronized batch sending

v5.3.6

correct counting

synchronized batch sending

v5.3.5

do not close socket in synchronized sending

v5.3.4

fix