Box Backup

Improve debugging of named pipe operations and bbackupctl pipe interaction.

Add missing timeouts on command socket writes.

Fix warning about assigning literal string constants to a char *

Fix test failures caused by connections left open on Windows.

Fix compile errors in tests on Windows.

Add comments about why some tests are skipped on Windows.

Catch exceptions in individual tests and clean up nicely. This stops stale daemons from hanging around if a single test fails because it throws an exception, which otherwise would cause the whole suite to abort immediately without cleaning up after itself.

Don't try to kill daemons at beginning of each deselected test. This just results in huge console noise if we can't kill a daemon for some reason. Kill them once, after all tests have run, instead.

Add comment about reason for code duplication. The mysterious case of the missing Write(const std::string&) in the night-time, or rather in subclasses of IOStream which declares it.

Improve some exception messages in lib/raidfile. Use the new macros to ensure that exceptions contain a message and filename, following the new standard format.