cmd/present: add request address to logged errors
cmd/present: add request address to logged errors

Change-Id: I504d29d7196b8c61cff5e92bb4244a34c9c41fa8
Reviewed-on: https://go-review.googlesource.com/24331
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

golang/tools,syreclabs/go-tools,golang/tools,golang/tools,syreclabs/go-tools,syreclabs/go-tools,syreclabs/go-tools,golang/tools,golang/tools,syreclabs/go-tools,syreclabs/go-tools