修复登录页面认证时，在前端有负载均衡的时候，获取client ip错误的问题。

cat client 偶现NPE问题,

- adjust transaction sample link from “first” to “latest”
- adjust event sample link from “first” to “latest”

- default queue size adjusted from 5000 to 1000 to use less memory
- queue size can be configured via JVM options -Dqueue.size=500
- change log level from ERROR to WARN for “Netty write buffer is full!
…”

fix bug when sample ratio=0.3

Fix broken headings in Markdown files

对于特殊字符报错No group 9。

比如调用时报错为No group 9。

Update web-core.tld

remove unuse IPSeekerManager  config

the class IPSeekerManager is no longer use,when run the war in Resin，it will throw Exception,so remove it.

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