[jreed-docs] Document Botan dependency.

Also remove <note> tags around SQLite3 block.

Did not mention specific issues with Debian/Ubuntu for now.

doc/guide/bind10-guide.xml

@@ -79,21 +79,26 @@
         3.1 is the minimum version which will work.
       </para>
 
-      <note><para>
-	The authoritative server requires SQLite 3.3.9 or newer.
-	The <command>b10-xfrin</command>, <command>b10-xfrout</command>,
-	and <command>b10-zonemgr</command> modules require the
-	libpython3 library and the Python _sqlite3.so module.
-      </para></note>
-<!-- TODO: this will change ... -->
+      <para>
+	BIND 10 uses the Botan crypto library for C++. It requires
+	at least Botan version 1.8. To build BIND 10, install the
+	Botan libraries and development include headers.
+      </para>
 
 <!--
 TODO
-document botan requirements
 Debian and Ubuntu:
  libgmp3-dev and libbz2-dev required for botan too
 -->
 
+      <para>
+	The authoritative server requires SQLite 3.3.9 or newer.
+	The <command>b10-xfrin</command>, <command>b10-xfrout</command>,
+	and <command>b10-zonemgr</command> modules require the
+	libpython3 library and the Python _sqlite3.so module.
+      </para>
+<!-- TODO: this will change ... -->
+
 <!-- TODO: list where to get these from -->
 
       <note>