+Differences to version 20.x
+
+- Starting with ngIRCd 21, the ciphers used by SSL are configurable and
+ default to HIGH:!aNULL:@STRENGTH (OpenSSL) or SECURE128 (GnuTLS).
+ Previous version were using the OpenSSL or GnuTLS defaults, DEFAULT
+ and NORMAL respectively.
+
+- When adding GLINE's or KLINE's to ngIRCd 21 (or newer), all clients matching
+ the new mask will be KILL'ed. This was not the case with earlier versions
+ that only added the mask but didn't kill already connected users.
+