MFC r241143:

MFC	r241143:

rpc: be sure to free cl_netid and cl_tp.

When creating a client with clnt_tli_create, it uses strdup to copy
strings for these fields if nconf is passed in. clnt_dg_destroy frees
these strings already. Make sure clnt_vc_destroy frees them in the same
way.

Tested by:	David Wolfskill
Obtained from:	Bull GNU/Linux NFSv4 Project (libtirpc)

git-svn-id: svn://svn.freebsd.org/base/stable/9@241601 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f