Seems the latter isn't used outside of the functions that were deprecated
in the previous commit and with UsageAnalyzer not making use of this
information unclear why we should keep it around.
Relates to #3187.
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.
fixes for using BiFs in standalone global initializations
avoiding redundant global initializations
updates to maintenance scripts and notes
removal of an unused member variable