[3553] Minor typos corrected in documentation

doc/guide/dhcp6-srv.xml

@@ -1944,8 +1944,8 @@ should include options from the isc option space:
         <simpara><command>docsis-cmts</command> - Yet another possible source of MAC
         address information are DOCSIS options inserted by a CMTS that acts
         as a DHCPv6 relay agent in cable networks. This method attempts to extract
-        MAC address information from suboption 1026 (cm mac) from vendor specific option
-        with vendor-id=4491. This vendor option extracted from relay-forward message,
+        MAC address information from suboption 1026 (cm mac) of the vendor specific option
+        with vendor-id=4491. This vendor option is extracted from the relay-forward message,
         not the original client's message.
         </simpara>
       </listitem>
@@ -1953,7 +1953,7 @@ should include options from the isc option space:
         <simpara><command>docsis-modem</command> - Yet another possible source of MAC
         address information are DOCSIS options inserted by the cable modem itself.
         This method attempts to extract MAC address information from suboption 36 (device id)
-        from vendor specific option with vendor-id=4491. This vendor option extracted from
+        of the vendor specific option with vendor-id=4491. This vendor option is extracted from
         the original client's message, not from any relay options.
         </simpara>
       </listitem>