John Scipione 19a1dd49cf API docs: update TypeConstants.h documentation
Most of these say Haiku R1 but were introduced in BeOS R3 or R5.

Add documentation for a bunch of missing types.

Some minor updates to BMessage docs.

Change-Id: Ic6ad1439bd280ab8bc641a6e5c99b93ead512cbc
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3199
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
2020-09-10 17:18:09 +00:00
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