implement tagging on events based on header, and add query string using
event query grammar

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

extensible way

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Improve logging and memomize transactions hashes

Signed-off-by: Silas Davis <silas@monax.io>

Our SIGNEXTEND was broken on positive numbers because for these numbers
it `Add`ed the sign extension mask rather than `And`ing it.

I took the opportunity to tidy up the arithmetical opcodes and add some
test.

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

event-waiting code in client and other miscellaneous fixes.

Signed-off-by: Silas Davis <silas@monax.io>

buffered loggers), fixed a few logging-related things, and added
cooldown wait in shutdown to Gosched the logging ring buffer.

Signed-off-by: Silas Davis <silas@monax.io>

language for building logging configs from preset sink tree builders.

Signed-off-by: Silas Davis <silas@monax.io>

channels. Adds a lot of complexity and the same value can be
better satisfied by the sinks mechanism (just filter).

licence: remove various GPLv3 copyright headers;

event_new: remove unused package that had been copied for discussion

monax: lingering eris -> monax company rename

licence: last pass, further cleanup