fixbug connection killing led floating point exception

wait again when sem_wait returns EINTR

install.sh: create empty history file after installation

Update architecture-ch.md

change to v16/v20 instead of master/develop

Update faq-ch.md

Update faq-ch.md

:

Update faq-ch.md

Update faq-ch.md

Master

[td-1227]

[TD-1203]

[TD-1203]

There is a error message in first use of taos, because the history
file doesn't exist.

This patch tried to create an empty history file after installation,
then users won't see the error message.

| [root@045a9307c53a ~]# taos
|
| Welcome to the TDengine shell from Linux, Client Version:2.0.1.1
| Copyright (c) 2017 by TAOS Data, Inc. All rights reserved.
|
| Failed to open file /root/.taos_history
| taos>
Signed-off-by: Amos Kong <kongjianjun@gmail.com>

Hotfix/os

Update faq-ch.md

add new faq about JDBC

Master