Prevent replaying ClientHello messages when Finished message are epoch 0 #6139

Job	Run time
make check (--enable-asynccrypt-sw --enable-ocspstapling --enable-ocspstapling2 CFLAGS="-pedantic...	1m 14s
make check (--enable-ocsp CFLAGS="-DTEST_NONBLOCK_CERTS -pedantic -Wdeclaration-after-statement -...	1m 11s
make check (--enable-asynccrypt --enable-all --enable-dtls13 CFLAGS="-pedantic -Wdeclaration-afte...	2m 49s
	5m 14s

Provide feedback