Allow use of Negotiate/NTLM for proxy authentiation in ra_neon, without needing to explicitly configure a redundant username and password.
Allow use of Negotiate/NTLM for proxy authentiation in ra_neon,
without needing to explicitly configure a redundant username and
password.

* subversion/libsvn_ra_neon/session.c
  (svn_ra_neon__open): Enable (only) Negotiate auth to the proxy if no
  proxy-username is configured.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@869948 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion