info-provider: Fix publishing of SRM

When srm-loginbroker was removed as a service, publishing the
srm to loginbroker was altered to publish the family name as
'srm' rather than 'SRM'. This is in line with our other doors,
but I was unaware that info-provider checks for this particular
string and that the check is case sensitive.

This patch updates info-provider to check for the lower case
string.

Target: trunk
Request: 2.7
Require-notes: no
Require-book: no
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: http://rb.dcache.org/r/6222/
srm: Improve error message on file_busy and duplication_errors

I think these messages are more to the point. The duplication error
message is taken from the SRM spec.

Target: trunk
Request: 2.7
Require-notes: no
Require-book: no
Acked-by: Paul Millar <paul.millar@desy.de>
Acked-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Patch: http://rb.dcache.org/r/6223/
libs: update to nfs4j-0.6.2

Changelog for nfs4j-0.6.1..nfs4j-0.6.2
    * [2f24baa] nfsv3: fix creation of symbolic link

Acked-by: Albert Rossi
Target: master, 2.7
Require-book: no
Require-notes: no
Merge remote-tracking branch 'upstream/master'