The base directory relative to which user-specific configuration files should be stored.
Subfolder to append to determined path.
If path does not exist, create directory using 700 permissions (i.e. allow access only for current user).
Path to user-specific configuration directory or empty string on error.
xdgAllConfigDirs, xdgConfigDirs
See Implementation
The base directory relative to which user-specific configuration files should be stored.