README: tagline and the steward at the door

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

README.md

@@ -2,14 +2,18 @@
 
 # Steward
 
+*Every Hold has a steward at the door; this one gives each newcomer an address.*
+
 Steward is a DHCPv4 server you configure through a web UI, a REST API and
 a command line client, all three backed by the same API. It is the
 companion of [Jarl](https://gitea.adbraun.lol/adam/jarl), the BIND manager,
 and works the same way: every change is checked as a whole before it is
 used, is recorded in a history where it can be undone, and is audited.
 
-In Skyrim, the Jarl's steward runs the hold's daily business, keeping the
-keys among other things. Steward hands out the hold's addresses.
+In Skyrim, a steward greets whoever comes to the door and sees to their
+needs. Steward is the first thing a device meets when it joins your
+network: it greets it, gives it an address, and tells it the way around
+(the router, the DNS servers).
 
 ## What it does