- Unserializing files that were previously kicked out of the open-file
cache would cause them to be fopen'd with the original access
permissions which is usually 'w' and causes truncation. They
are now opened in 'a' mode. (addresses #780)
- Add 'max_files_in_cache' script option to manually set the maximum
amount of opened files to keep cached. Mainly this just helped
to create a simple test case for the above change.
- Remove unused NO_HAVE_SETRLIMIT preprocessor switch.
- On systems that don't enforce a limit on number of files opened for
the process, raise default max size of open-file cache from
32 to 512.
