Moroccan authorities have sentenced a Youtuber who criticized the king to prison, and detained a journalist-activist who defended anti-government protesters in a tweet.Freedom of speech advocates say the moves reflect growing pressure against those who use social networks to express anger at economic and social problems.A court in Settat handed a four-year prison sentence to Mohammed Sekkaki for referring to Moroccans as donkeys and criticizing King Mohammed VI, in a video posted on YouTube