Log Message:
Import network-3.1.2.7

Version 3.1.2.7
* No change from 3.1.2.6 but to take a right procedure to upload "network"
  to Hackage for Windows.

Version 3.1.2.6
* Making IPv4PktInfo on Win the same as that on Posix #522
* Add support for nix/ghcjs #517

Version 3.1.2.5
* Regenerate configure script with autoconf-2.69 to temporarily fix broken
  cabal-3.4.0.0 on Windows. Note that the old one was generated with
  autoconf-2.71. #513

Version 3.1.2.3
* Supporting M1 Mac #510
* Workaround for autoconf on Windows #508
* Fixing building failure on SmartOS #507
* HsNet.h: remove unused fn hsnet_inet_ntoa definition #504
* Use a working define for OpenBSD detection #503

Version 3.1.2.2
* Allow bytestring 0.11 #490
* Export StructLinger #491
* Fix a couple of broken tests on OpenBSD #498