do not insert a dest option header (even specified by a user) that should be placed before a routing header, unless a routing header really exists.
do not insert a dest option header (even specified by a user) that
should be placed before a routing header, unless a routing header
really exists.

Obtained from:	KAME

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase