Adopt cadprox as the Caddyfile owner

Formatting only: adds the cadprox header and switches indentation to tabs,
which is Caddy's canonical format. Verified by adapting the config before
and after with the Caddy binary and comparing the resulting JSON, which is
byte-identical, so no proxy behaviour changed.

Caddyfile

@@ -1,29 +1,35 @@
+# Managed by cadprox - Caddy reverse proxy configuration
+#
+# Site blocks below are managed by cadprox and will be rewritten when you save
+# a change in its web UI. Blocks that cadprox does not recognise are preserved
+# verbatim at the end of this file.
+
 bdmurphy.me {
-    encode gzip
-    reverse_proxy 127.0.0.1:8080
+	encode gzip
+	reverse_proxy 127.0.0.1:8080
 }
 
 vault.bdmurphy.me {
-    encode gzip
-    reverse_proxy 127.0.0.1:8082
+	encode gzip
+	reverse_proxy 127.0.0.1:8082
 }
 
 umbraudio.bdmurphy.me {
-    encode gzip
-    reverse_proxy 192.168.123.12:8420
+	encode gzip
+	reverse_proxy 192.168.123.12:8420
 }
 
 abs.bdmurphy.me {
-    encode gzip
-    reverse_proxy 192.168.123.5:13378
+	encode gzip
+	reverse_proxy 192.168.123.5:13378
 }
 
 umbraforge.bdmurphy.me {
-    encode gzip
-    reverse_proxy 192.168.123.14:8425
+	encode gzip
+	reverse_proxy 192.168.123.14:8425
 }
 
 umbratrans.bdmurphy.me {
-    encode gzip
-    reverse_proxy 192.168.123.14:8442
-}
+	encode gzip
+	reverse_proxy 192.168.123.14:8442
+}