OpenNebula

For example, with the password 'zyna3=%-raleaSe' :

   # onedb fsck -v -S localhost -u oneadmin  -d opennebula
   MySQL Password: 
   Error connecting to DB: bad URI(is not URI?): mysql://oneadmin:zyna3=%-raleaSe@localhost:0/opennebula

If you're going to use an undocumented non-standard URI scheme internally to pass authentication information, you should at least follow the normal rules for constructing URI's: percent-encode the userinfo parts as needed when constructing the URI and decode them when interpreting the URI. Or better yet, dump the pointless artifice of a 'mysql:' URI scheme here altogether.