Fixed getting game/replay id from /savereplay cmd argument

[timocov]

This is the port of fixes FA-mods/SupremeScoreBoard#20.

Previously /savereplay cmd arg had a format of gpgnet://localhost/uid/username.SCFAreplay, but in FAForever/downlords-faf-client@1ae6c7e#diff-3d47503b30b47f5a259049a2e45e1eb555b502bd1f9cc68c936394a0d8fc6f1fR192 it has been changed to gpgnet://localIp:localReplayPort/uid/username.SCFAreplay, what leads a bug when in the ID text in score board instead of replayid there is local replay port ("magic number" 20 in string.find(url, "/", 20) and string.sub(url, 20, lastpos-1) is for length of gpgnet://localhost/) ¯_(ツ)_/¯

This PR fixes this bug.

[shalkya]

merging it to see how it works directly in deploy/fafdevelop

[shalkya]

alright i'm not completely sure of what it fixes :
that's what i'm getting ingame :

this is what i'm getting when reading the local replay :

this behaviour is exactly the same than in current game

[timocov]

@shalkya Isn't SSB on your screenshots instead of built-in score board?

[shalkya]

Alright i thought it was a fix with SSB too. All good.

[timocov]

I meant, if you'd like to test the fix for SSB, I guess you need to apply patch from SSB repo instead of this one.

Frankly I didn't test the fix with built-in score board, I just found a copy-paste from SSB and apply the fix here (I hope it was copy-paste, not sure what's the source actually).

I guess it should fix the following field and show a replay id instead of local port: