Moooorrrrreee shield cleanup: New Zealand, Indonesia, Norway, Natural Earth, India, Italy, Netherland, Belgium

[nvkelso]

Following up from #1491 comments that are deferred to v1.6 milestone.

1. Natural Earth e-road shield_text needs to include the E (see zoom 7).
2. New Zealand State Highway isn't coming thru as NZ:SH network:

• https://www.openstreetmap.org/edit?way=119547951#map=17/-36.93116/174.85064

1. Chile Panamerican when network is CL:national and shield_text is 5 than network should be CL:panamerican instead. Add Chile network logic #1606
2. Indonesia National should be ID:national (alternatively ID:motorway) but is just ID. Test for motorway and assign?
3. Not all Norway shields have default network of NO (very common). Similar to to Additional shield_text cleanup #1491 (comment).
4. Also odd that in Norway the e-road network's shield_text values here include the space which is removed in other countries.

• See: http://localhost:8000/#12/60.1398/10.3021
• 

1. Thailand seems broken (just TH with no more detail). Add Thailand network logic #1605
2. For Mexico, to disambiguate between the region of Mexico and the federal routes let's use MX:MX instead of MX:MEX (reserving the 3-char for the capital region).
   • MX:CMX is used for mexico city elsewhere so that's the pattern to follow.
3. India national highways are sometimes not receiving a shield_text value: https://www.openstreetmap.org/edit?way=180205706#map=17/20.92767/72.99029.
4. Blue Italian networks generally aren't being set: Add Italy network logic #1604

• Examples:
  • https://www.openstreetmap.org/edit?way=32759362#map=17/45.06297/8.27979
  • https://www.openstreetmap.org/edit?way=220398452#map=17/46.05134/11.48824
• Goals:
  • IT:SR Regional road
  • IT:SS Strade Statali (same artwork as IT:SR) - State highways
  • IT:SP strada provinciale (same artwork as IT:SR) - provincial road

1. Netherlands roads could be set looking at the ref prefix, and we have artwork:

• NL:A-road national motorway route, ‘A’ prefix
• NL:N-road provincial route, ‘N’ prefix
• NL:S-road city route, ‘S’ prefix

1. Belgium could use similar cleanup as Netherlands.
2. Austria is mostly working for AT:A-road relations, but there are many roads not in relations starting with A ref that could be assigned that network value. Similarly B refs could be given AT:B-road. Add Austria network logic #1607