This largely copies over Spicy's `.clang-format` configuration file. The
one place where we deviate is header include order since Zeek depends on
headers being included in a certain order.
better (than nothing) run-time errors for compiled scripts
fixes for dealing with recursive types in compiled scripts
fix for values in compiled scripts containing embedded comment markers
fixes for using BiFs in standalone global initializations
avoiding redundant global initializations
updates to maintenance scripts and notes
removal of an unused member variable
maintenance fixes for variadic run-time checks, '_' placeholder identifier
"-O allow-cond" permits compiling scripts to C++ when influenced by @if conditionals
more robust standalone compile-to-C++ properties
fix for nested "when" statements
test suite updates
