Consistent request bytes logging tags.

Make the byte count logging tags consistent. We have

cqbl - client request body length
cqhl - client request header length
pscl - client response body length
pshl - client response header length
psql - client response total length
pqbl - server request body length
pqhl - server request header length
sscl - server response body length
sshl - server response header length

We should add *ql to get the missing totals and standardize on *cl for the content length (csscl marginally tips the balance towards "content length" in favor of "body length").