Merge branch 'rj/cygwin-exit'

Treat ECONNABORTED the same as ECONNRESET in 'git credential-cache' to work around a possible Cygwin regression. This resolves a race condition caused by changes in Cygwin's handling of socket closures, allowing the client to exit cleanly when encountering ECONNABORTED. * rj/cygwin-exit: credential-cache: treat ECONNABORTED like ECONNRESET