fix(config): Add new "interfaces_exclude" setting to config schema

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

etc/cunicu.schema.yaml

@@ -463,8 +463,8 @@ $defs:
           type: string
           enum: [host, srflx, prflx, relay]
 
-      interface_filter:
-        title: Interface Filter
+      interfaces_include:
+        title: Include Interface Filter
         description: |
           A [glob(7)](https://manpages.debian.org/bookworm/manpages/glob.7.en.html) pattern to match interfaces against which are used to gather ICE candidates (e.g. `eth[0-9]`).
         type: string
@@ -473,6 +473,16 @@ $defs:
         - eth*
         - wlan0
 
+      interfaces_exclude:
+        title: Exclude Interface Filter
+        description: |
+          A [glob(7)](https://manpages.debian.org/bookworm/manpages/glob.7.en.html) pattern to match interfaces against which are not used to gather ICE candidates (e.g. `eth[0-9]`).
+        type: string
+        default: "*"
+        examples:
+        - eth*
+        - wlan0
+
       lite:
         title: Lite Agent
         description: |