Generalize optical disc documentation

- Rename file
- Rename title
- Update premalink
- Add redirect to old permalink
- Generalize content
- Unwrap lines
- Add link to /doc/security-guidelines/#dom0-precautions
- Update doc index link

Fixes QubesOS/qubes-issues#4783

common-tasks/optical-discs.md

@@ -0,0 +1,20 @@
+---
+layout: doc
+title: Optical Discs
+permalink: /doc/optical-discs/
+redirect_from:
+ - /doc/recording-optical-discs/
+ - /en/doc/recording-optical-discs/
+---
+
+Optical Discs
+=============
+
+Passthrough reading and recording (a.k.a., "burning") is not supported by Xen.
+Currently, the only options for reading and recording optical discs (e.g., CDs, DVDs, BRDs) in Qubes are:
+
+ 1. Use a USB optical drive.
+ 2. Attach a SATA optical drive to a secondary SATA controller, then assign this secondary SATA controller to a VM.
+ 3. Use a SATA optical drive attached to dom0.  
+    (**Caution:** This option is [potentially dangerous](/doc/security-guidelines/#dom0-precautions).
+

common-tasks/recording-optical-discs.md

@@ -1,22 +0,0 @@
----
-layout: doc
-title: Recording Optical Discs
-permalink: /doc/recording-optical-discs/
-redirect_from: /en/doc/recording-optical-discs/
----
-
-Recording Optical Discs
-=======================
-
-Passthrough recording (a.k.a., "burning") is not supported by Xen. Currently,
-the only options for recording optical discs (e.g., CDs, DVDs, BRDs) in Qubes
-are:
-
- 1. Use a USB optical drive.
- 2. Attach a SATA optical drive to a secondary SATA controller, then assign this
-    secondary SATA controller to a VM.
- 3. Use a SATA optical drive attached to dom0.  
-    (**Caution:** This option may violate the Qubes security model if it entails
-    transferring untrusted data (e.g., an ISO) to dom0 in order to record it on
-    an optical disc.)
-

doc.md

@@ -67,7 +67,7 @@ redirect_from:
  * [Backup, Restoration, and Migration](/doc/backup-restore/)
  * [Using DisposableVMs](/doc/disposablevm/)
  * [Using and Managing USB Devices](/doc/usb/)
- * [Recording Optical Discs](/doc/recording-optical-discs/)
+ * [Optical Discs](/doc/optical-discs/)
  * [Managing Application Shortcuts](/doc/managing-appvm-shortcuts/)
  * [Enabling Fullscreen Mode](/doc/full-screen-mode/)
  * [Tips and Tricks](/doc/tips-and-tricks/)