v2.7.0

Features

[agent.java]

• support distributed tracing for jdk 11 httpclient.
• support sql profiling of mariadb jdbc driver 1.8.x and 2.x.
• configurable xlog db key index size
• mitigate too many hystrix profile steps

[webapp]

• api for server disk usage
• api for remove inactive object
• api for thread list, dump, heap histo, env, socket status

MISC

• webapp security patch

Bug Fix

• workaround some exceptions of webapp.