add an helper to use the compression context easily
add an helper to use the compression context easily

erikd/hs-tls,AaronFriel/hs-tls,beni55/hs-tls,beni55/hs-tls,tolysz/hs-tls,tolysz/hs-tls,erikd/hs-tls,lancelotsix/hs-tls,AaronFriel/hs-tls,lancelotsix/hs-tls