fix(transit): real route-id modes for Prague, Bordeaux and Rouen; dated Warsaw/Poznań credits; data.gov.my refresh

- Prague PID: map route-id ranges from PID's GTFS (metro L991-993, S/R trains
  L1000s/L1100s, P ferries L1800s, trolleybuses 50-59, X lines, funicular LD)
  instead of 'below 100 is a tram, rest bus'.
- Bordeaux TBM: trams ride numbered ids 59-62/163/164 (A-F), boats 951-953;
  the old letter match never fired.
- Rouen Astuce: TCAR:90 Metro as tram, TCAR:99 Calypso as ferry; Le Havre FUNI.
- Warsaw and Poznan: credit carries the data date (and Warsaw links its API),
  as their terms require.
- data.gov.my feeds: CC BY 4.0, refreshMs 30 s to stay under 4 requests/min;
  proxy honours per-feed refreshMs.
- Denver: quote the RTD agreement; tests use the feeds' real route ids.

changelog.d/1628-transit-more-cities.md

@@ -7,5 +7,8 @@
   Edmonton, Halifax and Victoria. Each feed records its licence, or that none
   is stated, in the registry and DATA_SOURCES.md. Speeds published in km/h
   (Lisbon, Montpellier, Toulon) are converted to m/s by the proxy; route ids
-  read as the line on the vehicle; Prague, Bordeaux and Le Havre trams and
-  Venice waterbuses take their own mode (IMBrandao).
+  read as the line on the vehicle; Prague metro, trains, trams and ferries,
+  Bordeaux trams and boats, the Rouen Métro, Le Havre trams and Venice
+  waterbuses take their own mode. The Warsaw and Poznań credits carry the
+  data date their terms ask for, and the data.gov.my feeds are fetched at
+  most twice a minute to stay inside the API's rate limit (IMBrandao).