Fixed problem with https in tags.

If for example the website tag starts with https:// then it appeared in
OsmAnd as http://https://

https is not that unusual:
http://taginfo.openstreetmap.org/keys/website#values
http://taginfo.openstreetmap.org/keys/contact:website#values
Merge pull request #451 from ypid/https-fix

Fixed problem with https in tags.