CNN — Schoolchildren raise money for socks, mothers buy winter clothes and sleeping bags, community groups collect donations for body armor. Russian citizens are crowdfunding to equip soldiers deployed to Ukraine as winter closes in on the battlefield. Troops have complained they are short of basic equipment – and the message has reached President Vladimir Putin. Putin and other Russian officials have said that teething problems with supplying newly mobilized troops sent to Ukraine are being overcome, partly by a shake-up in supply chains. But the Kremlin has also stepped up pressure on those who dare to complain – and…