serverutil/upspinserver: run gofmt
serverutil/upspinserver: run gofmt

Change-Id: Idf9ddb11cf00a26771e3dd218927dd5f00e1421f
Reviewed-on: https://upspin-review.googlesource.com/8541
Reviewed-by: Eduardo Pinheiro <c9d6fd76b920b269b838bbb70f683c6db503d8d1@gmail.com>

upspin/upspin,upspin/upspin