There are platform-specific security providers:

ifeq ($(OPENJDK_TARGET_OS), windows)
  PLATFORM_MODULES += jdk.crypto.mscapi
endif
ifeq ($(OPENJDK_TARGET_OS), solaris)
  PLATFORM_MODULES += jdk.crypto.ucrypto
endif

They are documented in some security documentation. This issue is to decide if docs bundle should include platform-specific providers.