The result of

replace u_int32 uint32_t */*.[ch]
replace 'int32 ' 'int32_t ' */*.[ch]
replace '(int32)' '(int32_t)' */*.[ch]
replace 'int32,' 'int32_t,' */*.[ch]
replace 'int32	' 'int32_t	' */*.[ch]

followed by one fixup of a variable with the unfortunate name uint32.

This change banishes a lot of ugly cuft from include/ntp_types.h