Support multi-segmented timezones

Author: garethj2

src/haystack/timezone/iana.rs

@@ -51,7 +51,7 @@ pub fn timezone_short_name(date: &DateTimeType) -> String {
     tz_id[tz_id.find('/').map_or(0, |v| v + 1)..].to_string()
 }
 
-static PREFIXES: [&str; 14] = [
+static PREFIXES: [&str; 18] = [
     "Africa",
     "America",
     "Asia",
@@ -66,6 +66,10 @@ static PREFIXES: [&str; 14] = [
     "Mexico",
     "Pacific",
     "US",
+    "America/Argentina",
+    "America/Indiana",
+    "America/Kentucky",
+    "America/North_Dakota",
 ];
 
 fn find_timezone(name: &str) -> Result<Tz, String> {

tests/zinc/test_datetime.rs

@@ -61,10 +61,15 @@ fn test_zinc_datetime_utc_decode_millis() {
 }
 
 #[test]
-fn test_zinc_datetime_utc_decode_tz() {
+fn test_zinc_datetime_utc_decode_tz_london() {
     assert!(from_str("2020-02-10T16:00:00.0Z London").is_ok());
 }
 
+#[test]
+fn test_zinc_datetime_utc_decode_tz_la_rioja() {
+    assert!(from_str("2020-02-10T16:00:00.0+02:00 La_Rioja").is_ok());
+}
+
 #[test]
 fn test_zinc_datetime_utc_decode_bad() {
     assert!(from_str("1996-12-19T16:39:57K").is_err());