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This commit provides a unified API for performing SQLite3 queries.
Queries that return rows store their resulting data in a libucl object
tree.

Using libucl enables us to do some pretty powerful things, like convert
a SQLite3 database to JSON as one example. We can construct complex
object trees, clone objects, etc.

Not all data types are supported--only the ones I myself need right this
very moment. A more complete data type support will follow later as the
need arises.
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

The dummy log is the default and is effectively a NOP. It's set in case
the user forgets to use a real logging backend (syslog is the only other
supported logging backend right now).
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

Also prepend the message with the type of message (ERROR, INFO,
WARNING).
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

Only syslog is supported at this time.
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

This code hasn't been tested. My next step is to write Kyua-based unit
tests.
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>