Ports: Replace mc config.sub patch with our own download

`mc` runs `autoconf` on the fly, which unpacks a `config.sub` from its
own files. This means that support for `serenity` (and the fact whether
the patch successfully applies) depends on the version of `autoconf`
that is installed on the host.

Instead, just always replace it with a fresh version straight from the
GNU server.

Ports/mc/package.sh

@@ -15,6 +15,8 @@ configopts=(
     "--with-ncurses-includes=$SERENITY_BUILD_DIR/Root/usr/local/include/ncurses"
     "--with-ncurses-libs=$SERENITY_BUILD_DIR/Root/usr/local/lib"
 )
+use_fresh_config_sub=true
+config_sub_path=config/config.sub
 
 pre_patch() {
     run ./autogen.sh

Ports/mc/patches/0001-config-config.sub-Add-SerenityOS-as-portable-system.patch

@@ -1,29 +0,0 @@
-From 34a4ba3c619add44391b7d7a7422babab9993fbb Mon Sep 17 00:00:00 2001
-From: Kenneth Myhra <kennethmyhra@gmail.com>
-Date: Sat, 25 Dec 2021 19:01:58 +0100
-Subject: [PATCH 1/3] config/config.sub: Add SerenityOS as portable system
-
-- [ ] Local?
-- [X] Should be merged to upstream?
-- [ ] Resolves issue(s) with our side of things
-- [ ] Hack
----
- config/config.sub | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/config/config.sub b/config/config.sub
-index 1d8e98b..85b7fde 100755
---- a/config/config.sub
-+++ b/config/config.sub
-@@ -1363,7 +1363,7 @@ case $os in
- 	# The portable systems comes first.
- 	# Each alternative MUST end in a * to match a version number.
- 	# -sysv* is not here because it comes later, after sysvr4.
--	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
-+	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* | -serenity* \
- 	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
- 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
- 	      | -sym* | -kopensolaris* | -plan9* \
--- 
-2.25.1
-

Ports/mc/patches/0001-filemanager-ext.c-Include-strings.h-if-SerenityOS.patch

@@ -1,7 +1,7 @@
 From 749c81e5006dea41daf16e99c8a60926236d2373 Mon Sep 17 00:00:00 2001
 From: Kenneth Myhra <kennethmyhra@gmail.com>
 Date: Sat, 25 Dec 2021 19:15:35 +0100
-Subject: [PATCH 2/3] filemanager/ext.c: Include strings.h if SerenityOS
+Subject: [PATCH 1/2] filemanager/ext.c: Include strings.h if SerenityOS
 
 - [ ] Local?
 - [X] Should be merged to upstream?

Ports/mc/patches/0002-filemanager-ext.c-Use-str_ncasecmp-instead-of-strnca.patch

@@ -1,7 +1,7 @@
 From 0a5b0b9c2bf5befae8e2e831e75a95f2f0bb26a3 Mon Sep 17 00:00:00 2001
 From: Kenneth Myhra <kennethmyhra@gmail.com>
 Date: Tue, 11 Jan 2022 19:56:13 +0100
-Subject: [PATCH 3/3] filemanager/ext.c: Use str_ncasecmp instead of
+Subject: [PATCH 2/2] filemanager/ext.c: Use str_ncasecmp instead of
  strncasecmp if SerenityOS
 
 - [ ] Local?

Ports/mc/patches/ReadMe.md

@@ -1,15 +1,6 @@
 # Patches for mc on SerenityOS
 
-## `0001-config-config.sub-Add-SerenityOS-as-portable-system.patch`
-
-config/config.sub: Add SerenityOS as portable system
-
-- [ ] Local?
-- [X] Should be merged to upstream?
-- [ ] Resolves issue(s) with our side of things
-- [ ] Hack
-
-## `0002-filemanager-ext.c-Include-strings.h-if-SerenityOS.patch`
+## `0001-filemanager-ext.c-Include-strings.h-if-SerenityOS.patch`
 
 filemanager/ext.c: Include strings.h if SerenityOS
 
@@ -18,7 +9,7 @@ filemanager/ext.c: Include strings.h if SerenityOS
 - [ ] Resolves issue(s) with our side of things
 - [ ] Hack
 
-## `0003-filemanager-ext.c-Use-str_ncasecmp-instead-of-strnca.patch`
+## `0002-filemanager-ext.c-Use-str_ncasecmp-instead-of-strnca.patch`
 
 filemanager/ext.c: Use str_ncasecmp instead of strncasecmp if SerenityOS