Wrap pt-stalk to collect forensic data about MySQL when problems occur

The run-pt-stalk wrap the pt-stalk script, run with:

git clone https://github.com/arstercz/system_report.git
cd system_report
./run-pt-stalk interface mysql_port

you can change user and password in run-pt-stalk file, and the value shoule be in base64 format:

32   "[client]" \
33   "user=$(echo -n eHh4eHh4 | base64 -d)" \
34   "password=$(echo -n eHh4eHh4 | base64 -d)" \

Everyone can change for following code in pt-stalk script to send mail:

1319             echo "$msg on $(hostname)" \
1320             | mail -r '[email protected]' -S smtp='127.0.0.1' -s "Collect triggered on $(hostname)" \
1321               "$OPT_NOTIFY_BY_EMAIL"

pt-stalk use mail command, we can change the sender and smtp server by -r and -S options.

pt-stalk support the plugin so that we can change the problems occur's conditions. Example in the plugin dirs is to summary the cpu by the all MySQL process used.

all self-defined function should be named trg_plugin.

We had fixed the following bugs:

#1557877

#1644694

#976179

#1083488

and add the following features:

1. capture traffic by use tcpdump;
2. output numa information;
3. record mysql process oom_score