Request indefinite lifetime instead of 0
More updates

- add result codes
- add Flags
- add name types
- handle the XDR encoder treating pointers as redirects rather than as
  arrays of length 0 or 1
An attempt to port gss-client to use the gss-proxy
Finish client
Refactor some common utility functions
Add a proxy-based server
Add a little info about the proxy
Fix displaying the client name
Handle updating server contexts ourselves
Only free a security context if we established one
Add a godeps file