Closes#2.
Rewrite all Rhizome db query code using new retry primitives defined in
"rhizome.h": sqlite_step_retry(), sqlite_retry(), sqlite_retry_done(), etc.
Replace all calls to sqlite3_prepare_v2() with sqlite_prepare() which does
proper error logging.
Fix bug: re-invoking sqlite3_blob_close() on SQLITE_BUSY return causes process
to abort. Use an explicit BEGIN...COMMIT around the blob writing code instead.
Tested using repeated invocations of batphone/tests/meshms1.
Delete deprecated Rhizome db code in rhizome_crypto.c that has been replaced
with keyring file.
serval_packetvisualise() is now replaced by DEBUG_packet_visualise() which uses
logging system not stderr (so now it will appear in Android log).
Replaced several fprintf(stderr,...) with DEBUGF(...).
Command line only prints a full help message on "help" command -- a command
parse failure simply informs the user about the "help" command.
Tests assert that stderr contains no ERROR: lines after a successful exit
Rewrote sqlite_exec_int64() to separate error outcomes from legitimate
result values
Changed several WHY() calls to DEBUG()
Improved test framework
Improve regular expressions for common data types in test scripts
Revert column count field delimiter in "rhizome list" from ":" to "\n"
Add a few more test cases
that is called only when needed, and marks a manifest as finalised
if the verifcation fails. reading a manifest now never sets
finalised flag, as either _finalise() or _verify() must be called.
