fixes issue 419 + relax assert on UserConnectToServer which is not present   on earlier Windows versions.   i#388 covers ensuring we can find it when present.
fixes issue 419
+ relax assert on UserConnectToServer which is not present
  on earlier Windows versions.
  i#388 covers ensuring we can find it when present.

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@312 5b54908e-ead4-fc18-b48a-0285e6dbc711

rnk/drmemory,rnk/drmemory,rnk/drmemory,rnk/drmemory