pcp updates: proc metric access

[Nathan Scott <nathans@xxxxxxxxxx>]

Changes committed to git://git.pcp.io/pcp.git dev

Frank Ch. Eigler (1):
      fix security PR1101: unprivileged access to linux proc.* metrics on 
modern kernel

Nathan Scott (1):
      qa: add test qa/860 exercising proc.memory.maps access

 qa/860                          |   39 +++++++++++++++++++++++++++++++++++++++
 qa/860.out                      |   10 ++++++++++
 qa/group                        |    1 +
 src/pmdas/linux_proc/contexts.c |   16 ++++++++--------
 4 files changed, 58 insertions(+), 8 deletions(-)