Added index to Logs.channel for distinct and order by clause to remove filesort
Added index to Logs.channel for distinct and order by clause to remove filesort

Added index to Logs.uID for potential join to Users table


Former-commit-id: 5ce3f57e541f9450dad20a6e5578e1ff47947f9e
concrete5/concrete5,jaromirdalecky/concrete5,MrKarlDilkington/concrete5,olsgreen/concrete5,olsgreen/concrete5,biplobice/concrete5,concrete5/concrete5,acliss19xx/concrete5,triplei/concrete5-8,deek87/concrete5,haeflimi/concrete5,jaromirdalecky/concrete5,deek87/concrete5,acliss19xx/concrete5,concrete5/concrete5,concrete5/concrete5,deek87/concrete5,mlocati/concrete5,deek87/concrete5,KorvinSzanto/concrete5,hissy/concrete5,a3020/concrete5,biplobice/concrete5,mainio/concrete5,rikzuiderlicht/concrete5,biplobice/concrete5,acliss19xx/concrete5,mlocati/concrete5,jaromirdalecky/concrete5,haeflimi/concrete5,a3020/concrete5,mainio/concrete5,mlocati/concrete5,olsgreen/concrete5,MrKarlDilkington/concrete5,triplei/concrete5-8,MrKarlDilkington/concrete5,mlocati/concrete5,hissy/concrete5,rikzuiderlicht/concrete5,rikzuiderlicht/concrete5,mainio/concrete5,hissy/concrete5,biplobice/concrete5,hissy/concrete5,haeflimi/concrete5,triplei/concrete5-8,haeflimi/concrete5,KorvinSzanto/concrete5,jaromirdalecky/concrete5,KorvinSzanto/concrete5