simplify rand reader in tlsclient test math.Rand does not work for some reason (tests are still not reproducible)
simplify rand reader in tlsclient test
math.Rand does not work for some reason (tests are still not reproducible)

gregory-m/go-fuzz,h8liu/go-fuzz,ebfe/go-fuzz,ebfe/go-fuzz,btracey/go-fuzz,bmbernie/go-fuzz,pierrec/go-fuzz,dgryski/go-fuzz,gregory-m/go-fuzz,zhuyue1314/go-fuzz,TelnetMike/go-fuzz,pierrec/go-fuzz,stephens2424/go-fuzz,pmezard/go-fuzz,zhuyue1314/go-fuzz,bmbernie/go-fuzz,pmezard/go-fuzz,stephens2424/go-fuzz,TelnetMike/go-fuzz,btracey/go-fuzz,h8liu/go-fuzz,dgryski/go-fuzz