Whitespace and indentation fixes.

This also changed the file permissions stored in git for a couple of header
files, removing the executable bit. Didn't realize they were different from
all the others, but apparently my editor decided to change them. Now
they're the same as all the other files, which seems good.

Michael Paquier and me.
More whitespace cleanup.

Make whitespace and indentation more consistent in SQL_API function
declarations.