global: Use check-local in Makefile.am instead of overriding check directly This helps with dependency problems, like running "make check" in lib-storage without "make" first would try to compile the test programs too early and fail.

lib-fs: unit tests for fs-api/fs-posix A core component, really ought to be covered by the unit tests. This barely scrapes the surface, but is better than nothing: filesystem/files/iterators, read/write/exists, good and bad cases. Signed-off-by: Phil Carmody <phil@dovecot.fi>

lib-fs: Implement all lib-fs functions as wrappers to parent stream.

lib-fs: Improved unit tests.

lib-fs: Added initial fs-metawrap unit test.

lib-fs: Added fs-test backend for helping with creation of fs-wrapper unit tests.

lib-fs: Track operation timing statistics if enable_timing setting is set.

lib-fs: Added "dict" backend, which is a wrapper to using lib-dict.

lib-fs: Added "randomfail" driver. Using this in front of fs drivers allows randomly injecting failures. For example: mail_attachment_fs = randomfail:all=10,read=30,read-range=2000-3000:sis posix This means that all FS operations have a 10% chance of failing, except reads have a 30% chance of failing. If the read fails, it'll fail somewhere between offsets 2000-3000 (the default is 0, so it'll fail at the start of file). The supported operations are: wait metadata prefetch read write lock exists stat copy rename delete iter. "all" applies to all of them. The supported ranges are: read-range, write-range, iter-range.

Moved fs-compress from lib-fs to lib-compression. This solves build ordering issues.

lib-fs: Added fs-compress wrapper. Future TODO could include automatically detecting the format of the input file, but this should be optional.

lib-fs: Added istream-fs-file to lazily read from fs_file.

Moved lib-fs/fs-test to "doveadm fs" command.

lib-fs: fs-test now sets the ssl_client_set.ca_dir

fs-metawrap: Delay writing the metadata headers until first data is written. Also some other read/write fixes.

lib-fs: Added "metawrap" wrapper to implement metadata as headers in the file content.

lib-fs: Added fs-test to easily test FS API calls.

lib-fs: Automatically try to load missing driver as plugin.

Added lib-fs for simple filesystem accessing. Implemented POSIX, SiS and SiS-queue backends.