ZIMBABWE's businesses were shut and streets deserted in the capital Harare early on Friday as security forces increased patrols to stop anti-government protests called by activists over corruption and economic hardship. President Emmerson Mnangagwa, who is under pressure to revive a stricken economy, has said the protests constitute an "insurrection" by the opposition. In central Harare and nearby Mbare township - a hotbed of past protests - businesses, including banks and supermarkets, were shut as police and soldiers patrolled the streets. "Workers were told not to come today just in case there was trouble," said a security guard, who identified…