Fix issues with caPutLog support

[FreddieAkeroyd]

• Add better mapping to dbFlfTypes.h definitions
• use locally defined VALUE_to_string()
• Fix expansion of gateway version preprocessor macros for WIN32

[ralphlange]

Received positive feedback from Michael Sintschuk who built and tested this PR. Merging.

Thanks a lot, @FreddieAkeroyd and Michael!