Add the key "process name" to find a matching rule.

Add the key "process name" to find a matching rule.

Hi,

Changelog of v6:
================
 * No change.

Changelog of v5.1:
==================
 * BUGFIX: Clear the flags meaning "found a matching rule"
   when a process name does not match.

   There was a problem that cgexec and cgclassify didn't work correctly
   if a user executes cgexec/cgclassify based on /etc/cgrules.conf.
   For example, if a root user executes `cgclassify $$` on the following
   /etc/cgrules.conf, the process ($$) should be moved to users/root on
   cpuset and memory subsystems. But the process was moved to users/root/cp
   on memory subsystem only.
     Example of /etc/cgrules.conf:
     =============================
     root:cp          cpuset  users/root/cp
     %                memory  users/root/cp
     root             cpuset  users/root
     %                memory  users/root

   The cause is why the flags meaning "found a matching rule" (uid, gid, and
   matched) is not cleared when a process name does not match. This problem
   is fixed on this patch.

Changelog of v5:
================
 * Rebase the patch to the latest code.

Changelog of v4:
================
 * No change.

Changelog of v3:
================
 * BUGFIX: Fix the handling of '%' in /etc/cgrules.conf.

Changelog of v2:
================
 * Use strcmp() instead of strncmp() for checking a process name strictly.
 * Some cleanups.

Description:
============
This patch adds the key "process name" to find a matching rule.

Thanks
Ken'ichi Ohmichi

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>