#166 Exception when vCard values contain colon

[rhi]

Parsing this VCard:

BEGIN:VCARD
UID:123:456.vcf
FN:Test Test
END:VCARD

fails with:

net.fortuna.ical4j.data.ParserException: Error at line 2:Error parsing line
    at net.fortuna.ical4j.vcard.VCardBuilder.build(VCardBuilder.java:200)
    at net.fortuna.ical4j.vcard.VCardBuilder.build(VCardBuilder.java:137)
    at Test.main(Test.java:32)
Caused by: java.net.URISyntaxException: Illegal character in scheme name at index 0: 123:456.vcf
    at java.net.URI$Parser.fail(URI.java:2829)
    at java.net.URI$Parser.checkChars(URI.java:3002)
    at java.net.URI$Parser.checkChar(URI.java:3012)
    at java.net.URI$Parser.parse(URI.java:3028)
    at java.net.URI.<init>(URI.java:595)
    at net.fortuna.ical4j.vcard.property.Uid.<init>(Uid.java:80)
    at net.fortuna.ical4j.vcard.property.Uid$Factory.createProperty(Uid.java:113)
    at net.fortuna.ical4j.vcard.property.Uid$Factory.createProperty(Uid.java:1)
    at net.fortuna.ical4j.vcard.VCardBuilder.parseProperty(VCardBuilder.java:261)
    at net.fortuna.ical4j.vcard.VCardBuilder.build(VCardBuilder.java:197)
    ... 2 more

This is because new URI("123:456.vcf") throws a URISyntaxException because it thinks 123 is the URI scheme, and schemes musn't begin with a number.

(I found this issue because the widely-used Zimbra server returns such Vcards with colons in UID values.)