Joins URL path segments with `/`.
URLBuild["path", {"param1" -> val1, "param2" -> val2, …}]
URLBuild[{"path1", "path2", …}]
URLBuild[path, params]
URLBuild[assoc]
URLBuild[assoc, params]
URLBuild[{"a", "b"}]
→ a/bURLBuild[<|"Scheme" -> "https", "Domain" -> "x.com", "Path" -> {"", "p"}, "Query" -> {"k" -> "v"}|>]
→ https://x.com/p?k=vURLBuild[URLParse["https://x.com/p?q=1"]]
→ https://x.com/p?q=1