[glib] (12 commits) ...Merge branch 'file-permissions-redux' into 'master'

[Philip Withnall <pwithnall src gnome org>]

Summary of changes:

  51d73ef... gfile: Factor out flags when copying files
  53f6ede... gfile: Don’t copy files as private if using default permi
  2268f36... gio-tool: Add a --default-permissions argument to `gio copy
  775014d... gfile: Use a more specific error message if symlinks are no
  1b7ab81... glocalfile: Don’t define symlink vfunc if it’s unsuppor
  7d2bce8... glocalfile: Don’t define unsupported copy vfunc
  674ba78... gfile: Document a few nullable vfuncs
  5dd5269... glocalfileoutputstream: Only pass file mode, not type, to c
  bfdc5fc... glocalfileinfo: Only return file mode, not type, as UNIX_MO
  67772b6... tests: Unconditionally enable the file permissions test
  eb21257... tests: Expand g_file_copy() tests to test DEFAULT_PERMS fla
  406c8b0... Merge branch 'file-permissions-redux' into 'master'