Add a BUGS file with known issues.
Add a BUGS file with known issues.

developerfm/reptyr,yatsek/reptyr,yatsek/reptyr,yatsek/reptyr,jerome-pouiller/reredirect,nelhage/reptyr,nelhage/reptyr,developerfm/reptyr,nelhage/reptyr,developerfm/reptyr,jerome-pouiller/reredirect