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.
* origin/topic/neverlord/version-header:
testing/zeek-version-link: Assume nm is there
Drop dependency for zeek_dynamic_plugin_base
Fixup ifdef check in Plugin.h
Update cmake_minimum_required() in test plugins
testing: Add zeek-version-link tests
Clean up ZEEK_CONFIG_SKIP_VERSION_H issues
cmake-format during merge
This also includes:
- Deprecating the NetSessions name.
- Renaming the zeek::sessions global to zeek::session_mgr and deprecating the old name.
- Renaming Sessions.{h,cc} to SessionManager.{h,cc}.
Also now uses CMake's ENABLE_EXPORTS target property for the zeek
executable to ensure symbols are visible to plugins. Prior to CMake
3.4, the policy was to export symbols by default for certain platforms,
but later versions need either the explicit target property or policy.
