Remove special logic for S0 on good roads, because it is too complicated and should be corrected in OSM

The name of a hiking network is on the same side as its line, has less spacing and is not in bold style

option to show/hide MTB scale S0 on good roads; Show MTB scale S0 always on bad roads (i.e. tracktype="grade3|grade4|grade5|~) and S1 or higher always on all roads; Show MTB scale on roads, even if not allowed for bikes; Revert "Show MTB scale always when available and do not restrict by highway/leisure ways"

modify default layer and rename layers to "Hiking difficulty scales" and "Bike restrictions" and re-ordered

reduce downhill penalties; prefer mtb:scale=0-|0|0+|1-|1|1+|2-|2 and sac_scale=mountain_hiking (differently without changing mtb_sac_scale, because it should stay zero by default)

Render paths where cycling is permitted, but not explicitly designated, like normal paths and not as cycle ways

- added crags for UK maps, smaller symbols for parking lane/street side, amenity=parking_entrance, natural=sinkhole, natural=crater for nodes, highway=busway, names for various landuses to all map styles, mtb_role=forward/backward, landuse=plant_nursery, barrier=toll_booth, railway=train_station_entrance, railway=subway_entrance
- changed areas of touristic attractions, walls, parking zoom levels, non-route refs for smaller highways

5.1 07/06/22
- added: tracktype=grade1 to emphasized paved ways options,  low zoom emphasized paved cycle ways rendering (cycling), man_made=breakwater, amenity=bicycle_repair_station, amenity=public_bookcase
- changed rendering of: man_made=groyne, waterway=weir, low zoom waymarks colored routes (hiking)
- removed: mtbnetwork=umn (MTB)

- made for next OAM map generation based on mapsforge maps V5, starting December 2021
- new routes and separate route refs: hknetwork=own, network=ocn, mtbnetwork=omn, ref_hike/rec_cycle/ref_mtb
- better waymarks support: OSMC waycolors orange/brown/gray, lots of additional, new OSMC foreground/backgrounds, changed rendering of OSMC waycolors
- changed symbols fee=yes symbols for parking and toilets, removed obsolete uwn/ucn networks
- added building=greenhouse

simpler and less-overlapping display of "protected_area|national_park|nature_reserve" also for Elevate4RacingBike