Two changes:

  * 'getModTime' now uses 'modificationTimeHiRes' instead of 'modificationTime'
    on Unix when the former is available.

  * 'ModTime' is now represented as a 64-bit unsigned integer in Windows UTC
    format (that is, 100 ns resolution and day zero is 1601-01-01) on all
    platforms. Previously we used POSIX seconds, which was wrong (low
    resolution). Sandbox timestamp files in old format are now up-converted on
    the fly.

Fixes #3132.

Fix bug #3150, regression introduced by a2184538.

Added tests for this case, as well as some more.  This
probably breaks the Windows build.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Fix glob in file monitor unit test

Handle "\r\n" in internal library package tests (fixes #3147)

Add flag to disable Cabal package tests that use shared libraries

It's used as an ID. Fixes #3145.

See https://github.com/haskell/cabal/issues/3133#issuecomment-183846588.

 {test,bench}: Ignore "bad version" error when loading LBI.

Format cabal-install/tests/README.md

[ci skip]

Start documenting cabal-install integration tests

The flag --skip-shared-library-tests allows the tests to run when
shared libraries are unavailable, such as during the AppVeyor build.

[ci skip]

See https://github.com/haskell/cabal/pull/1821#commitcomment-16052702.

configureToolchain: Use the same program names as 'ghc --info'.

[ci skip]

For example, we used to search for "ld" when the program name specified by 'ghc
--info' was "i386-unknown-linux-ld".

Fixes #3140.

Fixes #3139. Fixes #3133.

Otherwise the build will fail on GHC 8. See #3133.