BIBO backend service

[lingu]

20210630/Qi reports that startbibo could not start ncat. Zhihao helped them reinstall cod://bibo but it did not help. lingu went to the site and found wp286b-6 has a full root. After clearing bibo history log (about 20GB), we were able to start sage. There we some strange auntie tasks in sage, I ran sage_clear on wp289b-1 to clear old tasks. Then I killed some old processes using port 62818, and ran startbibo again. This time it works.