Allow scoped IPv6 addresses.

httpclient.diff

diff --git a/libs/luci-lib-httpclient/luasrc/httpclient.lua b/libs/luci-lib-httpclient/luasrc/httpclient.lua
index 79ce41294..7a335a016 100644
--- a/libs/luci-lib-httpclient/luasrc/httpclient.lua
+++ b/libs/luci-lib-httpclient/luasrc/httpclient.lua
@@ -105,13 +105,18 @@ function parse_url(uri)
 		rest = tmp
 	end
 
-	url.host, tmp = rest:match("^%[([0-9a-fA-F:]+)%](.*)$")
+	url.host, tmp = rest:match("^%[(.+)%](.*)$")
 	if url.host and tmp then
-		url.ip6addr = ip.IPv6(url.host)
+		local ip, scope = url.host:match("^([^%%]+)%%(.+)$")
+		url.ip6addr = ip.IPv6(ip or url.host)
 		if not url.ip6addr then
 			return nil
 		end
-		url.host = string.format("[%s]", url.ip6addr:string())
+		if scope then
+			url.host = string.format("[%s%%%s]", url.ip6addr:string(), scope)
+		else
+			url.host = string.format("[%s]", url.ip6addr:string())
+		end
 		rest = tmp
 	else
 		url.host, tmp = rest:match("^(%d+%.%d+%.%d+%.%d+)(.*)$")