[PATCH] server: Share security descriptop among all pipe instances.

[Jacek Caban]

Based on patch by Jonathan Doron.

Signed-off-by: Jacek Caban 
---
 dlls/ntdll/tests/pipe.c | 21 ++++++++++----------
 server/named_pipe.c     | 52
+++++++++++++++++++++++++++++++++++++++++--------
 2 files changed, 55 insertions(+), 18 deletions(-)