9.6.0-rc3

• Remove spurious second call to 'mustRun' in sql:cli f0b17d1
• Fix #3895. drush ssh --cd does not chdir for remote calls (#3904) 0306eb4
• Fix #3894. Assume pre-escaped for single arg calls to ssh command. b0a3620
• Fix #3897. Allow multiple topics for commands. (#3907) 15950ff
• Remove extra param in log msg. 0af6535
• Remove respawn after 50% memory exhaustion during batch processing. 92b2359