Supply the full message for ERR lockers

When returning an ERR locker, re-assemble the data field into the
message, rather than returning the first word. (Trac: #1408)
Selectively disable filesystem type parsing

Allow callers to decide whether FilsysLookup should "know" about
filesystem types or not.  Useful for higher-level APIs that have
their own understanding of lockers.  Priority parsing is still
performed (e.g. for FSGROUPs), and the record format of:
TYPE DATA [PRIORITY]
is still enforced.
Release 0.2.11

Release 0.2.11, which bumps Standards-Version, and also update
the version number in setup.py, as well as adding maintainer fields