Remove undocumented unconfigurable NATIVE_CALLBACKS define
Remove undocumented unconfigurable NOPLUGIN define
scripting.c: add some missing initializers
Remove another little trace of VMS
Fix an unused parameter warning
Remove manual library/executable version checking; use the linker + semantic versioning
Distribute all sources, no sense not doing so.
Always use double, not float, for real type
Remove unused configure flag --disable-link-test