private HttpRequest.Builder request(String str) throws IOException {
		try {
			return HttpRequest.newBuilder(serverURI.resolve(str))
					.setHeader("User-Agent", GHIDRA_USER_AGENT);
		}
		catch (IllegalArgumentException e) {
			throw new IOException(e);
		}
	}
Creates a new instance of a HttpSymbolServer.

@param serverURI URI / URL of the symbol server 
@param isTrusted flag, if true the http server can be trusted when querying and downloading
Ghidra/Features/PDB/src/main/java/pdb/symbolserver/HttpSymbolServer.java