This doesn't break any extensions NOT using IDataPack, and we do not know of any that are.
* The extension storage utility of this interface has been broken for the last 9 months, with ISourceMod::CreateDataPack being disabled.
* The plugin interop utility of this interface (its stated purpose) has been broken for the last 11+ years, with ISourceMod::GetDataPackHandleType being disabled.
I imagine it only survived the first cleanup 11 years ago because CSS:DM was using it internally, which it has now been migrated away from.
Compiled all the included extensions without changes (API compat), and loaded extensions build pre-change without issue (ABI compat).
* Match old DataPack behavior when overwriting data
* Make RemoveItem more flexible
* Ditch implied RemoveItem behavior & asher fixes
* KyleS nits - but fixed before he says them
* Add back implicit behavior
* Update CDataPack.cpp
Committing to the spec.
* Update CDataPack.h
* fixup removing last item if explicitly requested
* Fix logic for accepting pack pos, rather than index
* Fixup IsReadable
* headache is over now
* Migrate CDataPack from a Cassette Tape.
Tested-By: Headline22.
* Remove last IsReadable param pass.
* populate len still if CDataPack::ReadString is unreadable or the wrong type.
* Fyren Fixes(TM)(R)(C).
* Deprecate IDataPack.
