Updated HTTP request API (markdown)

HTTP-request-API.md

@@ -83,12 +83,13 @@ Parameter | Value Range | Description | Since Version
 | --- | --- | --- | --- |
 &SM= | 0 to 9 | Set the main segment (values are reported to XML) | 0.9.0
 &SS= | 0 to 9 | Select segment to apply THIS api call to | 0.9.0
-&SV= | 0 or 1 | Set segment selected | 0.9.0
+&SV= | 0, 1 or 2 | Set segment selected (2 unselects others) | 0.9.0
 &S= | 0 to ledcount-1 | Set segment start | 0.9.0
 &S2= | 0 to ledcount | Set segment stop | 0.9.0
 &GP= | 1 to 255 | Set segment grouping | 0.9.1
 &SP= | 0 to 255 | Set segment spacing | 0.9.1
 &RV= | 0 or 1 | Reverse/Flip Segment direction | 0.9.1
+&SB= | 0 to 255 | Segment brightness | 0.10.0
 
 ## General and Experimental