Merge branch '3955_cleanup'
* 3955_cleanup: (50 commits)
(mc_AC_GET_FS_INFO): rename to mc_GET_FS_INFO...
Sync with gnulib
5d6ca1aeeb04b9b0cd760529d548ac26675ef9b9.
configure.c: fix AX_GCC_FUNC_ATTRIBUTE detection on custom CFLAGS
(panel_new_with_dir): variable 'err' is assigned a value that is never used.
(load_setup): reduce variable scope.
(mcview_display_hex): reduce variable scope.
(check_hardlinks): suspicious condition (assignment + comparison).
src/filemanager/filegui.c: fix coding style.
File operations: rename variables.
Clarify checks of dialog and widget existence.
Sync with gnulib
a3d1c7849936e481ae10dea5312a36a448a5d5bf.
Sync with gnulib
248cb6a2499ffa5a9e652d05e61c4a959fbae605.
VFS GC: use mc_timer.
VFS GC: reimplement using GSList.
vfs_stamping: make opaque.
src/filemanager/treestore.c: fix coding style, minor refactoring.
src/filemanager/tree.c: fix coding style, minor refactoring.
WTree: use gboolean type for boolean members.
(find_do_view_edit): Remove unused variable. Found by PVS-Studio:V575
(smbfs_fake_share_stat): Remove unneeded g_free(NULL) (PVS-Studio:V575)
...