add time.parse_iso

vlib/time/time.v

@@ -320,6 +320,22 @@ pub fn parse(s string) Time {
 	})
 }
 
+// `parse_iso` parses time in the following format: "Thu, 12 Dec 2019 06:07:45 GMT"
+pub fn parse_iso(s string) Time {
+	fields := s.split(' ')
+	if fields.len < 5 {
+		return Time{}
+	}
+
+	pos := months_string.index(fields[2]) or { return Time{} }
+	mm := pos/3 + 1
+
+	tmstr := malloc(s.len*2)
+	count := int(C.sprintf(charptr(tmstr), '%s-%02d-%s %s'.str,
+		fields[3].str, mm, fields[1].str, fields[4].str))
+	return parse(tos(tmstr, count))
+}
+
 pub fn new_time(t Time) Time {
 	return {
 		t |