Added $$tls$ rule condition

FAQ.md

@@ -2430,17 +2430,18 @@ $$flagged$
 $$deleted$
 ```
 
-To match *passed* message checks via a header condition (since version 1.1787; no/multi-from since version 1.1791):
+To match *passed* message checks via a header condition (since version 1.1787):
 
 ```
+$$tls$ (since version 1.1826)
 $$dkim$
 $$spf$
 $$dmarc$
 $$mx$
 $$blocklist$
 $$replydomain$
-$$nofrom$
+$$nofrom$ (since version 1.1791)
-$$multifrom$
+$$multifrom$ (since version 1.1791)
 ```
 
 Note that *regex* should be disable and that there should be no white space.

app/src/main/java/eu/faircode/email/EntityRule.java

@@ -271,7 +271,10 @@ public class EntityRule {
                         value.endsWith("$")) {
                     String keyword = value.substring(1, value.length() - 1);
 
-                    if ("$dkim".equals(keyword)) {
+                    if ("$tls".equals(keyword)) {
+                        if (!Boolean.TRUE.equals(message.tls))
+                            return false;
+                    } else if ("$dkim".equals(keyword)) {
                         if (!Boolean.TRUE.equals(message.dkim))
                             return false;
                     } else if ("$spf".equals(keyword)) {