pcp updates, pmmgr pid-file writing relaxation

["Frank Ch. Eigler" <fche@xxxxxxxxxx>]

Hi -

More goodies in pcpfans.git fche/pmmgr:

commit b26d9b801d6a06d5071f630115eee60e7ec5fb54
Author: Frank Ch. Eigler <fche@xxxxxxxxxx>
Date:   Thu Jan 22 21:56:56 2015 -0500

    pmmgr qa/666: fix comment typo
    
    There is no change in test results, just reduction in stderr noise.

commit be2ee30887b01c87ea7dfaf5ff40e11c030726ba
Author: Frank Ch. Eigler <fche@xxxxxxxxxx>
Date:   Thu Jan 22 21:37:44 2015 -0500

    pmmgr: make pid-file writing failure silent

commit b66e4c47eff9bdde466ce120f9ed1e91c76dbe85
Author: Frank Ch. Eigler <fche@xxxxxxxxxx>
Date:   Thu Jan 22 21:03:19 2015 -0500

    pmmgr: restore ability to invoke as non-pcp/non-root
    
    commit 27c0e02db32d6 broke pmmgr's ability to be run as any ordinary
    user, by mandating that it be able to report its pid in $PCP_RUN_DIR.
    This level of strictness is unprecedented and unnecessary, so we don't
    do that any more.