Use all these magic flags to build static binaries
Use all these magic flags to build static binaries

Even though the CLI was forcing static linking of C libraries, it
appears that this was not fully working. Through further investigation,
and the recommendation of
https://tschottdorf.github.io/linking-golang-go-statically-cgo-testing/
we added several flags that should force the use of golang's internal
networking libraries (netgo) and should not call out to C.

[Finishes #119703447, 120437611] (Github issue #843, #848)

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli