Merge tag 'docs-4.16' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "Documentation updates for 4.16.

  New stuff includes refcount_t documentation, errseq documentation,
  kernel-doc support for nested structure definitions, the removal of
  lots of crufty kernel-doc support for unused formats, SPDX tag
  documentation, the beginnings of a manual for subsystem maintainers,
  and lots of fixes and updates.

  As usual, some of the changesets reach outside of Documentation/ to
  effect kerneldoc comment fixes. It also adds the new LICENSES
  directory, of which Thomas promises I do not need to be the
  maintainer"

* tag 'docs-4.16' of git://git.lwn.net/linux: (65 commits)
  linux-next: docs-rst: Fix typos in kfigure.py
  linux-next: DOC: HWPOISON: Fix path to debugfs in hwpoison.txt
  Documentation: Fix misconversion of #if
  docs: add index entry for networking/msg_zerocopy
  Documentation: security/credentials.rst: explain need to sort group_list
  LICENSES: Add MPL-1.1 license
  LICENSES: Add the GPL 1.0 license
  LICENSES: Add Linux syscall note exception
  LICENSES: Add the MIT license
  LICENSES: Add the BSD-3-clause "Clear" license
  LICENSES: Add the BSD 3-clause "New" or "Revised" License
  LICENSES: Add the BSD 2-clause "Simplified" license
  LICENSES: Add the LGPL-2.1 license
  LICENSES: Add the LGPL 2.0 license
  LICENSES: Add the GPL 2.0 license
  Documentation: Add license-rules.rst to describe how to properly identify file licenses
  scripts: kernel_doc: better handle show warnings logic
  fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at
  doc: md: Fix a file name to md-fault.c in fault-injection.txt
  errseq: Add to documentation tree
  ...

Documentation/filesystems/ext2.txt

@@ -49,12 +49,10 @@ sb=n				Use alternate superblock at this location.
 
 user_xattr			Enable "user." POSIX Extended Attributes
 				(requires CONFIG_EXT2_FS_XATTR).
-				See also http://acl.bestbits.at
 nouser_xattr			Don't support "user." extended attributes.
 
 acl				Enable POSIX Access Control Lists support
 				(requires CONFIG_EXT2_FS_POSIX_ACL).
-				See also http://acl.bestbits.at
 noacl				Don't support POSIX ACLs.
 
 nobh				Do not attach buffer_heads to file pagecache.

Documentation/filesystems/ext4.txt

@@ -202,15 +202,14 @@ inode_readahead_blks=n	This tuning parameter controls the maximum
 			the buffer cache.  The default value is 32 blocks.
 
 nouser_xattr		Disables Extended User Attributes.  See the
-			attr(5) manual page and http://acl.bestbits.at/
-			for more information about extended attributes.
+			attr(5) manual page for more information about
+			extended attributes.
 
 noacl			This option disables POSIX Access Control List
 			support. If ACL support is enabled in the kernel
 			configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL is
 			enabled by default on mount. See the acl(5) manual
-			page and http://acl.bestbits.at/ for more information
-			about acl.
+			page for more information about acl.
 
 bsddf		(*)	Make 'df' act like BSD.
 minixdf			Make 'df' act like Minix.

Documentation/filesystems/vfat.txt

@@ -344,4 +344,4 @@ the following:
 	   characters in the final slot are set to Unicode 0xFFFF.
 
 Finally, note that the extended name is stored in Unicode.  Each Unicode
-character takes two bytes.
+character takes either two or four bytes, UTF-16LE encoded.