golang-github-facebookgo-httpdown-dev 0.0~git20160323.0.a3b1354-7 (ppc64el binary) in ubuntu cosmic

 This Go library provides a mechanism that makes it easy to build socket
 based servers that can be shut down without terminating active connections.
 .
 This library has been extended by the golang-github-facebookgo-grace-dev
 library package to also include graceful restarts.