add username builtin

fix unterminated map.ident strings for print, clear, and zero

fix printf with name on multiple events

fix parser line numbers for multi-line comments

support shift left and right

ref guide: add usage section

save bytes on comm usage

print BPF bytecode for debugging

Tools

allow uaddr() to work on non-bash

fix 64-bit integer constants

Tools

add apt.llvm.org apt-key instructions needed for newer/secured Ubuntu

Uaddr

Doc updates

Show Clang warnings and fix warnings we were causing with missing semicolons