updated to 7.3.1020

updated to 7.3.1020

7.3.1013  new regexp logging is a bit messy
7.3.1014  new regexp state dump is hard to read
7.3.1015  new regexp engine: Matching composing characters is wrong
7.3.1016  unused field in nfa_state
7.3.1017  zero width match changes length of match
7.3.1018  new regexp engine wastes memory
7.3.1019  not working with the new regexp engine: \%[oxduU]123
7.3.1020  not all patterns are tested with auto / old / new engine