K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2014-07-01T06:29:15.442175Z
K 7
svn:log
V 275
Perform a lockless check in sigacts_shared.

It is used only during execve (i.e. singlethreaded), so there is no fear
of returning 'not shared' which soon becomes 'shared'.

While here reorganize the code a little to avoid proc lock/unlock in
shared case.

MFC after:	1 week

END