Coda-6.9.4, LWP-2.5, RPC2-2.8, RVM-1.16

Bugfixes::

• Avoid possible crashes and/or data loss when volumes are removed from and re-added to the client cache.
• Add configuration setting (detect_reintegration_retry) for Coda clients running in a VMM which prevents dropping reintegrated operations when the virtual machine is reset to an earlier snapshot.
• Do not assert on various non-fatal conditions (failing chown/chmod) that may arise when for instance the client cache is stored on a vfat formatted file system.
• During backups, avoid unlocking locks that may have been taken by another thread.
• Allow changing of the ctime/mtime of symlinks.
• Avoid a server deadlock by correcting lock ordering between ViceFetch, ViceGetAttr and ViceValidataAttrs (problem identified and tracked down with lots of help from Rune).
• SFTP bulk data transfers could unexpectedly fail because it was checking an incorrect retry counter.

Enhancements::

• Improve tar support and add cpio archive formats for modification log checkpoints.
• Do not invoke server resolution on a single available replica.
• Add new incremental dump format that maintains full path information when converting the resulting volume dump to a tar archive.
• Add valgrind support to LWP.
• Simplify RPC2 retransmission interval calculation.