Remove useless description in document (#350)

Author: starwarfan

doc/servermd/Server.md

@@ -123,48 +123,6 @@ Before installing the OWT server, make sure your login account has sys-admin pri
 
 If you run OWT server on CentOS, configure the system firewall well to make sure all ports required by OWT server components are open.
 
-In order for the OWT server to deliver the best performance on video conferencing, the following system configuration is recommended:
-
-1. Add or update the following lines in /etc/security/limits.conf, in order to set the maximum numbers of open files, running processes and maximum stack size to a large enough number:
-
-        * hard nproc unlimited
-        * soft nproc unlimited
-        * hard nofile 163840
-        * soft nofile 163840
-        * hard stack 8192
-        * soft stack 8192
-
-   If you only want to target these settings to specific user or group rather than all with "*", please follow the configuration rules of the /etc/security/limits.conf file.
-
-2. Make sure pam_limits.so appears in /etc/pam.d/login as following:
-
-        session required pam_limits.so
-
-   So that the updated limits.conf takes effect after your next login.
-
-3. If you run OWT server on CentOS, add or update the following two lines in /etc/security/limits.d/xx-nproc.conf as well:
-
-        * soft nproc unlimited
-        * hard nproc unlimited
-        * hard nofile 163840
-        * soft nofile 163840
-
-4. Add or update the following lines in /etc/sysctl.conf:
-
-        fs.file-max=200000
-        net.core.rmem_max=16777216
-        net.core.wmem_max=16777216
-        net.core.rmem_default=16777216
-        net.core.wmem_default=16777216
-        net.ipv4.udp_mem=4096 87380 16777216
-        net.ipv4.tcp_rmem=4096 87380 16777216
-        net.ipv4.tcp_wmem=4096 65536 16777216
-        net.ipv4.tcp_mem=8388608 8388608 16777216
-
-5. Now run command /sbin/sysctl -p to activate the new configuration, or just restart your OWT server machine.
-
-6. You can run command "ulimit -a" to make sure the new setting in limits.conf is correct as you set.
-
 ### 2.3.3 Install the OWT server package {#Conferencesection2_3_3}
 
 On the server machine, directly unarchive the package file.
@@ -345,7 +303,7 @@ Follow the steps below to set up a OWT server cluster:
 
 13. Choose a worker machine to run conference-agent and/or webrtc-agent and/or streaming-agent and/or recording-agent and/or audio-agent and/or video-agent and/or sip-agent. This machine must be visible to other agent machines. If webrtc-agent or sip-agent is running on it, it must be visible to clients.
 
-    - If you want to use Intel<sup>®</sup> Visual Compute Accelerator (VCA) to run video agents, please follow section [Configure VCA nodes](#Conferencesection2_3_10) to enable nodes of Intel VCA as a visible separated machine.
+    - If you want to use Intel<sup>®</sup> Visual Compute Accelerator (VCA) to run video agents, please follow section [Configure VCA nodes](#Conferencesection2_3_11) to enable nodes of Intel VCA as a visible separated machine.
 
 14. Edit the configuration items in Release-<Version>/{audio, video, conference, webrtc, streaming, recording, sip}_agent/agent.toml.
     - Make sure the [rabbit.port] and [rabbit.host] point to the RabbitMQ server.