BERLIN (Reuters) -There are “important indications” that a Russian attack on Ukraine can be avoided through diplomacy given the Kremlin’s apparent interest in negotiations on its security demands, German Chancellor Olaf Scholz said on Saturday. With the United States warning of an imminent invasion, Scholz told the Munich Security Conference any attack would be a “serious mistake” with high “political, economic and geostrategic costs”. Russia denies planning an invasion. But there is “no justification” for the build-up of more than 100,000 Russian troops on Ukraine’s borders, Scholz said, dism…