Remove all instances of permalink: in YAML frontmatter

Converts existing permalink paths into redirect_from entries.

QubesOS/qubes-issues#6701

user/security-in-qubes/anti-evil-maid.md

@@ -1,8 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/anti-evil-maid/
 redirect_from:
+- /doc/anti-evil-maid/
 - /en/doc/anti-evil-maid/
 - /doc/AntiEvilMaid/
 - /wiki/AntiEvilMaid/

user/security-in-qubes/data-leaks.md

@@ -1,8 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/data-leaks/
 redirect_from:
+- /doc/data-leaks/
 - /en/doc/data-leaks/
 - /doc/DataLeaks/
 - /wiki/DataLeaks/

user/security-in-qubes/device-handling-security.md

@@ -1,7 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/device-handling-security/
+redirect_from:
+- /doc/device-handling-security/
 ref: 170
 ---
 

user/security-in-qubes/firewall.md

@@ -1,8 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/firewall/
 redirect_from:
+- /doc/firewall/
 - /doc/qubes-firewall/
 - /en/doc/qubes-firewall/
 - /doc/QubesFirewall/

user/security-in-qubes/split-gpg.md

@@ -1,8 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/split-gpg/
 redirect_from:
+- /doc/split-gpg/
 - /en/doc/split-gpg/
 - /doc/SplitGpg/
 - /doc/UserDoc/SplitGpg/

user/security-in-qubes/u2f-proxy.md

@@ -1,7 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/u2f-proxy/
+redirect_from:
+- /doc/u2f-proxy/
 ref: 167
 ---
 

user/security-in-qubes/vm-sudo.md

@@ -1,8 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/vm-sudo/
 redirect_from:
+- /doc/vm-sudo/
 - /en/doc/vm-sudo/
 - /doc/VMSudo/
 - /wiki/VMSudo/

user/security-in-qubes/yubi-key.md

@@ -1,8 +1,8 @@
 ---
 lang: en
 layout: doc
-permalink: /doc/yubi-key/
 redirect_from:
+- /doc/yubi-key/
 - /en/doc/yubi-key/
 - /doc/YubiKey/
 ref: 169