book.toml: clean up linkcheck exclusions, fix a couple links

Author: classabbyamp

book.toml

@@ -58,17 +58,9 @@ optional = true
 optional = true
 follow-web-links = true
 exclude = [
-	'kernel\.org',
-	'ntp\.org',
 	'\.onion',
 	'localhost',
-	'userbase\.kde\.org',
-	'sjtu\.edu\.cn',
-	'mirrors\.cnnic\.cn',
-	'void\.webconverger\.org',
-	'mirror\.vofr\.net',
-	'void\.chililinux\.com',
-	'voidlinux\.com\.br',
-	'reddit\.com',
 	'raspberrypi\.com',
+	'xnux\.eu',
 ]
+user-agent = "Mozilla/5.0"

src/installation/guides/arm-devices/raspberry-pi.md

@@ -12,7 +12,7 @@ functionality.
 The [command line](../../../config/kernel.md#cmdline) parameters passed to the
 kernel are in the `/boot/cmdline.txt` file. Some of the relevant parameters are
 documented in the [official
-documentation](https://www.raspberrypi.com/documentation/computers/configuration.html#the-kernel-command-line).
+documentation](https://www.raspberrypi.com/documentation/computers/configuration.html#kernel-command-line-cmdline-txt).
 
 ## Supported Models
 

src/installation/guides/fde.md

@@ -52,9 +52,9 @@ LUKS2 is only partially supported by GRUB; specifically, only the PBKDF2 key
 derivation function is
 [implemented](https://git.savannah.gnu.org/cgit/grub.git/commit/?id=365e0cc3e7e44151c14dd29514c2f870b49f9755),
 which is *not* the default KDF used with LUKS2, that being Argon2i ([GRUB Bug
-59409](https://savannah.gnu.org/bugs/?59409)). LUKS encrypted partitions using
-Argon2i (as well as the other KDF) can *not* be decrypted. For that reason, this
-guide only recommends LUKS1 be used.
+59409](https://web.archive.org/web/20250320141758/https://savannah.gnu.org/bugs/?59409)).
+LUKS encrypted partitions using Argon2i (as well as the other KDF) can *not* be
+decrypted. For that reason, this guide only recommends LUKS1 be used.
 
 Keep in mind the encrypted volume will be `/dev/sda2` on EFI systems, since
 `/dev/sda1` is taken up by the EFI partition.