[master] fix spelling

Noticed one while reading during Alan's training today.
Fixed two other misspellings while here.

Conflicts:
	doc/arm/Bv9ARM-book.xml

doc/arm/Bv9ARM-book.xml

@@ -1522,7 +1522,7 @@ zone "eng.example.com" {
                      <optional><replaceable>view</replaceable></optional></term>
                     <listitem>
                       <para>
-                        Delete a given TKEY-negotated key from the server.
+                        Delete a given TKEY-negotiated key from the server.
                         (This does not apply to statically configured TSIG
                         keys.)
                       </para>
@@ -11654,7 +11654,7 @@ example.com. NS ns2.example.net.
 		  <para>
                     If <literal>yes</literal>, this enables
 		    "bump in the wire" signing of a zone, where a
-		    unsigned zone is transfered in or loaded from
+		    unsigned zone is transferred in or loaded from
 		    disk and a signed version of the zone is served,
 		    with possibly, a different serial number.  This
 		    behaviour is disabled by default.