correctly check RAND_bytes error code
Merge pull request #878 from ggkitsas/rand-bytes-error-check

correctly check RAND_bytes error code
Update setup-seafile-mysql.py

Add '%s' to show error msg
Merge pull request #885 from imwhatiam/master

Update setup-seafile-mysql.py
Remove unused tolls. Discussed with Daniel Pan.
Merge pull request #892 from yason/remove_unused_tools

Remove unused tools. Discussed with Daniel Pan.
Stop install manuals from other packages
Merge pull request #898 from yason/rework_manuals

Stop install manuals from other packages