The package-db flag can now correctly handles relative paths
Fix BuildTestSuiteDetailedV09 on case-insensitive file systems

Fixes #1297 (again). Compiled object files are deleted before the detailed test
suite library is built. This is a workaround until the underlying cause is
known.
Merge pull request #1310 from ttuegel/test-build-detailed

Fix BuildTestSuiteDetailedV09 on case-insensitive file systems
Use a non-default build dir when building add-source deps.

Fixes #1281.
Merge pull request #1312 from 23Skidoo/sandbox-dist-builddir

Use a non-default build dir when building add-source deps.
80-col violations.
Use a subdir of 'dist' as build dir for building add-source deps.

Works better with 'cabal clean'.
80-col violations.
Make configAbsolutePaths work with sandboxes.

The package DB dir is created *after* we've changed the 'configPackageDBs'
setting with 'setPackageDB'.

Aside: we really need some functional tests for sandboxes.
80-col violations.
Typos.
80-col violation.
Use 'dist-sandbox-$SANDBOX_DIR_HASH' as the build dir for add-source deps.

This avoids the risk of conflicts if we use a single add-source dep with
multiple sandboxes.
Merge branch 'master' of https://github.com/manzyuk/cabal
80-col violation.
Avoid the timestamp check for `add-source --snapshot` dependencies.

Snapshot deps now behave more like `cabal-dev add-source`. Implemented by adding
a BuildTreeRefType field to the BuildRef index entry.

Fixes #1321.
Merge pull request #1322 from 23Skidoo/snapshots-avoid-timestamp-check

Avoid the timestamp check for `add-source --snapshot` dependencies.
Add a debug message.
Fix another issue caused by 'user-install: True'.

I'm starting to think that it's better to set it to False and solve the rootCmd
problem in another way.
Add a generalised variant of 'topHandler'.