* theory.html: Decouple timezones from countries earlier.

theory.html

@@ -142,10 +142,12 @@ <h2 id="naming">Timezone identifiers</h2>
   </li>
   <li>
     Be robust in the presence of political changes.
-    For example, names of countries are ordinarily not used, to avoid
+    For example, names are typically not tied to countries, to avoid
     incompatibilities when countries change their name (e.g.,
-    Zaire&rarr;Congo) or when locations change countries (e.g., Hong
+    Swaziland&rarr;Eswatini) or when locations change countries (e.g., Hong
     Kong from UK colony to China).
+    There is no requirement that every country or national
+    capital must have a timezone name.
   </li>
   <li>
     Be portable to a wide variety of implementations.