Ports/diffutils: Update diffutils to version 3.8

The fnmatch patch that was added in 6de6dff is reverted because it is
not clear why it is necessary, as discussed in #9206.

This also removes diffutils from the list of ports missing descriptions
as it no longer has any patches.

Meta/lint-ports.py

@@ -37,7 +37,6 @@ PORTS_MISSING_DESCRIPTIONS = {
     'c-ray',
     'curl',
     'dash',
-    'diffutils',
     'dosbox-staging',
     'dropbear',
     'ed',

Ports/AvailablePorts.md

@@ -31,7 +31,7 @@ Please make sure to keep this list up to date when adding and updating ports. :^
 | [`curl`](curl/)                        | curl                                                            | 7.82.0                   | https://curl.se/                                                               |
 | [`dash`](dash/)                        | DASH                                                            | 0.5.10.2                 | http://gondor.apana.org.au/~herbert/dash                                       |
 | [`dialog`](dialog/)                    | Dialog                                                          | 1.3-20220117             | https://invisible-island.net/dialog/                                           |
-| [`diffutils`](diffutils/)              | GNU Diffutils                                                   | 3.7                      | https://www.gnu.org/software/diffutils/                                        |
+| [`diffutils`](diffutils/)              | GNU Diffutils                                                   | 3.8                      | https://www.gnu.org/software/diffutils/                                        |
 | [`dmidecode`](dmidecode/)              | dmidecode                                                       | 3.3                      | https://github.com/mirror/dmidecode                                            |
 | [`doom`](doom/)                        | DOOM                                                            |                          | https://github.com/SerenityOS/SerenityDOOM                                     |
 | [`dos2unix`](dos2unix/)                | dos2unix                                                        | 7.4.2                    | https://waterlan.home.xs4all.nl/dos2unix.html                                  |

Ports/diffutils/package.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env -S bash ../.port_include.sh
 port=diffutils
-version=3.7
-files="https://ftpmirror.gnu.org/gnu/diffutils/diffutils-${version}.tar.xz diffutils-${version}.tar.xz b3a7a6221c3dc916085f0d205abf6b8e1ba443d4dd965118da364a1dc1cb3a26"
+version=3.8
+files="https://ftpmirror.gnu.org/gnu/diffutils/diffutils-${version}.tar.xz diffutils-${version}.tar.xz a6bdd7d1b31266d11c4f4de6c1b748d4607ab0231af5188fc2533d0ae2438fec"
 auth_type=sha256
 useconfigure=true
 use_fresh_config_sub=true

Ports/diffutils/patches/fnmatch.patch

@@ -1,14 +0,0 @@
-diff -Naur gettext-0.21/gettext-tools/gnulib-lib/fnmatch_loop.c gettext-0.21.serenity/gettext-tools/gnulib-lib/fnmatch_loop.c
---- diffutils-3.7/lib/fnmatch_loop.c	2020-06-26 21:57:10.000000000 +0200
-+++ diffutils-3.7.serenity/lib/fnmatch_loop.c	2021-05-08 05:06:59.944736766 +0200
-@@ -19,6 +19,10 @@
- 
- /* Match STRING against the file name pattern PATTERN, returning zero if
-    it matches, nonzero if not.  */
-+#ifdef __serenity__
-+# define FNM_EXTMATCH 9000
-+#endif
-+
- static int EXT (INT opt, const CHAR *pattern, const CHAR *string,
-                 const CHAR *string_end, bool no_leading_period, int flags)
-      internal_function;