Encrypted DNS health, comparing a zone's views, --local everywhere

jarld checks the DoT and DoH listeners every 10 minutes as a client would (page, dashboard, jarl encrypted-dns health, jarl_encrypted_dns_up). The Compare views tab and jarl zone diff show what differs between a zone's views, with Use this version. --local works on unlinked zones. A changed certificates.dir is followed by encrypted DNS's tls statements. Sharing an already shared version replaces other views' overrides.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/certificates.md

@@ -193,7 +193,10 @@ jarl option set listen-on 'port 853 tls dot { 10.0.10.5; }' --add
 ```
 
 A certificate named uses can't be deleted or lose its `dns` use until
-named no longer names its files.
+named no longer names its files. If you change `certificates.dir`, jarld
+writes the certificates to the new place when it starts and points the
+`tls` statements encrypted DNS wrote there (a hand-written `tls`
+statement you change yourself).
 
 ## A certificate you renew yourself