backend: easyjson -> Fix race condition
backend: easyjson -> Fix race condition

because github.com/mholt/caddy/caddyhttp/log/log.go:36 creates
a new httpserver.NewReplacer which sets the http.Request.Body
and as we're dereferencing in easyjson a race condition will occur.
With restoring the pointer, the race gets resolved.

corestoreio/caddy-esi,corestoreio/caddy-esi,SchumacherFM/caddyesi,SchumacherFM/caddyesi,corestoreio/caddy-esi,SchumacherFM/caddyesi