[PATCH v4 0/5] Add secinfo to the NFS client

[Bryan Schumaker <bjschuma@netapp.com>]

These patches will add the secinfo procedure to the NFS client 
and do some cleanup along the way.  The final result will should
be able to cross mountpoints using a different form of security
and auto-detect the security of an initial NFS v4 mount.

v4:
 - Properly set the number of security flavors decoded by the client
 - Return an int rather than an rpc_authflavor_t for better error checking
v3:
 - Check for server returning too many security flavors
 - Check for gss_oid_len > max_gss_oid_len
 - New functions in namespace.c should be static

v2:
 - Add more details about the call_sync improvement
 - Don't initialize global constant function pointers to NULL

Bryan