transport: use begin() and end() instead of sstring_view::data()
transport: use begin() and end() instead of sstring_view::data()

sstring_view::data() can return a pointer to a string that isn't null
terminated.

Fixes #19.

Signed-off-by: Paweł Dziepak <e29bb3265626c60caf76d587cabdfcd8b379ef80@cloudius-systems.com>

shaunstanislaus/scylla,aruanruan/scylla,shaunstanislaus/scylla,tempbottle/scylla,acbellini/scylla,rentongzhang/scylla,senseb/scylla,avikivity/scylla,kjniemi/scylla,gwicke/scylla,rluta/scylla,kangkot/scylla,acbellini/scylla,senseb/scylla,linearregression/scylla,scylladb/scylla,stamhe/scylla,raphaelsc/scylla,capturePointer/scylla,linearregression/scylla,asias/scylla,bowlofstew/scylla,phonkee/scylla,victorbriz/scylla,acbellini/scylla,glommer/scylla,shaunstanislaus/scylla,wildinto/scylla,tempbottle/scylla,duarten/scylla,victorbriz/scylla,raphaelsc/scylla,kangkot/scylla,asias/scylla,glommer/scylla,stamhe/scylla,rluta/scylla,victorbriz/scylla,senseb/scylla,bowlofstew/scylla,raphaelsc/scylla,aruanruan/scylla,kjniemi/scylla,guiquanz/scylla,tempbottle/scylla,rentongzhang/scylla,aruanruan/scylla,phonkee/scylla,eklitzke/scylla,eklitzke/scylla,duarten/scylla,avikivity/scylla,respu/scylla,scylladb/scylla,capturePointer/scylla,guiquanz/scylla,rentongzhang/scylla,kangkot/scylla,justintung/scylla,stamhe/scylla,avikivity/scylla,respu/scylla,rluta/scylla,scylladb/scylla,kjniemi/scylla,dwdm/scylla,phonkee/scylla,justintung/scylla,gwicke/scylla,eklitzke/scylla,wildinto/scylla,bowlofstew/scylla,dwdm/scylla,dwdm/scylla,glommer/scylla,wildinto/scylla,scylladb/scylla,respu/scylla,linearregression/scylla,guiquanz/scylla,duarten/scylla,gwicke/scylla,capturePointer/scylla,asias/scylla,justintung/scylla