Custom scheme in TargetMap

[rekby]

Add support optional define scheme in TargetMap
for example:
[
"1.2.3.4:443-http://2.2.2.2:1234",
"3.3.3.3:333-https://[::1]:94",
"3.1.2.1:123-[::1]:444" # <-- this mean default scheme
"]

[rekby]

I don't know if it mass need. And it will increase of targetmap parser complexity.