hid2client-write-lock-20050403

hid2client-write-lock-20050403

FIXES 17867

h_ID2Client currently returns a client struct with a shared lock. The
only caller of h_ID2Client (SRXAFS_FlushCPS) immediately calls
BoostSharedLock. This patch just goes ahead and makes h_ID2Client return
it with the write lock so we don't enter the Lock struct mutex multiple
times in a row. This also happens to remove the last reference to
BoostSharedLock in the tree.