update countres and capitals in quiz(6)

Changes:
- update country and capital names that have changed in recent years
- remove the formal prefix from South Africa for consistency with other
  country names
- add additional capitals for countries with multiple capitals
- add "The" as optional prefix for The Gambia and The Bahamas
- add missing suffix "City" to a few capitals
- add many missing countries

NetBSD appears to have also added territories which I've not added in this
update.

The removal of The Hague for The Netherlands was taken from NetBSD and
confirmed by otto@

The duplicate Turkey and Georgia entries have not been touched.

Prompted by a diff by Ben Fuller, who also provided much helpful feedback.

games/quiz/datfiles/africa

@@ -1,9 +1,9 @@
 Algeria:Alg[iers|er]
 Angola:Luanda
-Benin|Dahomey:Porto[-| ]Novo
+Benin:Porto[-| ]Novo
 Botswana:Gaborone
 Burkina Faso:Ouagadougou
-Burundi:Bujumbura
+Burundi:Gitega|Bujumbura
 Camero[o|u]n:Yaounde
 [Cabo|Cape] Verde:Praia
 Central Africa{n Rep{ublic}}:Bangui
@@ -16,9 +16,10 @@ Djibouti:Djibouti City
 Egypt:Cairo
 Equatorial Guinea:Malabo
 Eritrea:Asmara
+Eswatini|Swaziland:Mbabane|Lobamba
 Ethiopia:Addis Ababa
 Gabon:Libreville
-Gambia:Banjul
+{The }Gambia:Banjul
 Ghana:Accra
 Guinea-Bissau:Bissau
 Guinea:Conakry
@@ -42,10 +43,9 @@ Senegal:Dakar
 Seychelles:Victoria
 Sierra Leone:Freetown
 Somalia:Mogadishu
-{Rep{ublic} of }South Africa:Pretoria
+South Africa:Pretoria|Cape Town|Bloemfontein
 South Sudan:Juba
 Sudan:Khartoum
-Swaziland:Mbabane
 Tanzania:Dodoma
 Togo:Lome
 Tunisia:Tunis

games/quiz/datfiles/america

@@ -1,6 +1,8 @@
+Antigua and Barbuda:St. John's
 Argentina:Buenos Aires
-Bahamas:Nassau
+{The }Bahamas:Nassau
 Barbados:Bridgetown
+Belize:Belmopan
 Bolivia:La Paz|Sucre
 Bra[z|s]il:Brasilia
 Canada:Ottawa
@@ -8,19 +10,25 @@ Chile:Santiago
 Colombia:Bogota
 Costa Rica:San Jose
 Cuba:Ha[v|b]ana
+Dominica:Roseau
 Dominican Republic:Santo Domingo
 Ecuador:Quito
 El Salvador:San Salvador
-Guatemala:Guatemala
+Grenada:St. George's
+Guatemala:Guatemala City
 Guyana:Georgetown
-Haiti:Port au Prince
+Haiti:Port[-| ]au[-| ]Prince
 Honduras:Tegucigalpa
 Jamaica:Kingston
-Mexico:Mexico
+Mexico:Mexico City
 Nicaragua:Managua
-Panama:Panama
+Panama:Panama City
 Paraguay:Asuncion
 Peru:Lima
+Saint Lucia:Castries
+Saint Kitts and Nevis:Basseterre
+Saint Vincent and the Grenadines:Kingstown
+Suriname:Paramaribo
 Trinidad{ and Tobago}:Port of Spain
 United States|US{A}:Washington
 Uruguay:Montevideo

games/quiz/datfiles/asia

@@ -3,13 +3,14 @@ Armenia:Yerevan
 Australia:Canberra
 Azerbaijan:Baku
 Bahrain:Manama
-Bangladesh:Dacca
+Bangladesh:Dhaka|Dacca
 Bhutan:Thim[b|ph]u
 Brunei:Bandar Seri Begawan
 Cambodia:P{h}nom Penh
 China:Beijing|Peking
 Cyprus:Nicosia
-East Timor:Dili
+East Timor|Timor-Leste:Dili
+Fiji:Suva
 Georgia:Tbilisi
 India:New Delhi
 Indonesia:Jakarta|Djakarta
@@ -18,32 +19,44 @@ Iraq:Baghdad
 Israel:Jerusalem
 Japan:Tokyo
 Jordan:Amman
-Kazakhstan:Astana
+Kazakhstan:Nur-Sultan|Astana
+Kiribati:South Tarawa
 Kuwait:Al-Kuwait|Kuwait City
 Kyrgyzstan:Bishkek
 Laos:Vientiane
 Lebanon:Beirut
-Malaysia:Kuala Lumpur
+Malaysia:Kuala Lumpur|Putrajaya
-Maldive Islands:Male
+Maldive{ Island}s:Male
+Marshall Islands:Delap[-| ]Uliga[-| ]Djarrit
+Micronesia:Palikir
 Mongolia:Ulaanbaatar|Ulan Bator
 Myanmar|Burma:Naypyidaw|Nay Pyi Taw
+Nauru:Yaren
 Nepal:Kat{h}mandu
+New Zealand:Wellington
 North Korea:P{'}yongyang
 Oman:Muscat
 Pakistan:Islamabad
+Palau:Ngerulmud
 Papua[-| ]New Guinea:Port Moresby
 Philippines:Manila
 Qatar:Doha
+Samoa:Apia
 Saudi Arabia:Riyadh
 Singapore:Singapore
+Solomon Islands:Honiara
 South Korea:Seoul
-Sri Lanka:Colombo
+Sri Lanka:Colombo|{Sri Jayawardenepura }Kotte
 Syria:Damascus
 Taiwan:Taipei
+Tajikistan:Dushanbe
 Thailand:Bangkok
+Tonga:Nuku{'}alofa
 Turkey:Ankara
 Turkmenistan:Ashgabat
-United Arab Emirates:Abu Dhabi
+Tuvalu:Funafuti
+[United Arab Emirates|UAE]:Abu Dhabi
 Uzbekistan:Tashkent
+Vanuatu:Port Vila
 Vietnam:Hanoi
 Yemen:San{'}a

games/quiz/datfiles/europe

@@ -3,7 +3,7 @@ Andorra:Andorra la V[ell|iej]a
 Austria:Vienna|Wien
 Belarus|Byelorussia:M[i|e]nsk
 Belgium:Brussel[s|]|Bruxelles
-Bosnia[-Herzegovina|]:Sarajevo
+Bosnia{[ and |-]Herzegovina}:Sarajevo
 Bulgaria:Sofi[a|ya]
 Croatia:Zagreb
 Czech Republic:Prague|Praha
@@ -23,22 +23,23 @@ Latvia:Riga
 Liechtenstein:Vaduz
 Lithuania:Vilnius
 Luxembourg:Luxembourg
-[|Former Yugoslav Republic Of ]Macedonia:Skop[|l]je
 Malta:Valletta
 Moldova:Chisinau|Kishinev
 Monaco:Monaco
-Netherlands|Holland:The Hague|'sGravenhage|den Haag|Amsterdam
+Montenegro:Podgori[ca|tsa]
+Netherlands|Holland:Amsterdam
+North Macedonia:Skop[|l]je
 Norway:Oslo
 Poland:Wars[aw|zawa]
 Portugal:Lisbo[n|a]
-R[u|o]mania:Bucharest|Bucuresti
+Romania:Bucharest|Bucuresti
 Russia:Mos[cow|kva]
 San Marino:San Marino
+Serbia:Belgrade|Beograd
 Slovakia|Slovak Republic:Bratislava
 Slovenia:Ljubljana
 Spain:Madrid
 Sweden:Stockholm
 Switzerland:Bern{e}
 Turkey:Ankara
-Ukraine:Kiev|Kyiv
+Ukraine:Kyiv|Kiev
-Yugoslavia:Belgrade|Beograd