Send the same client_encoding we expect to get back
Send the same client_encoding we expect to get back

While 9.1 and later always replied with "UTF8", 9.0 at least seems
to send us back "UTF-8" if that's what we asked for.

cbandy/go-pq,dongzerun/pq,henrylee2cn/pq,stvp/pq,bugreplaydev/pq,sammi/pq,ympons/pq,erichnascimento/pq,VividCortex/pq,springning/pq,flynn/pq,ScriptRock/pq,jnewmano/pq,johto/pq,StabbyCutyou/pq,calebthompson/pq,amaniak/pq,jnewmano/pq,everalbum/pq,lib/pq,ympons/pq,bugreplaydev/pq,beni55/pq