The file handle is never reset to INVALID_HANDLE_VALUE, and thus the
destructor will assume the operation shall be cancelled and will
delete the temporary file.

This was a major breakage for saving the database file and the state
file.

New in clang 3.6.

New in clang 3.6.

MPD_PATH_MAX_UTF8 is only used by GLib-specific code currently.

Necessary for "final" on gcc 4.6.

Several MPD subsystems can now read gzipped files; for example, the
database file can be gzipped.

The new class is pluggable, to prepare for gzipped database files.

For now, the TextFile class remains, and will be refactored away
later.

Support operating systems that don't have O_CLOEXEC.

Eliminate the std::string overhead.

The XDG cache directory is part of the "base directories" spec like
$XDG_CONFIG_HOME, not "user directories".

Move code from CreateConfiguredDatabase() and add XDG support.  This
implements an automatic Linux fallback for the setting "db_file" if
none was specified.

The upper-case name seems to be the canonical one.

Move code from Path::RelativeFS() and make it generic.

Reduce overhead, don't duplicate the string.