sofos

Right now it seems like the advanced tool to mass-add tags is ignoring the setting to turn off searching the first post, if I'm understanding it correctly. What I want is to only do the search on the topic titles, but it seems to be returning results based on the title and the first post, even when I've toggled the "first post" switch to off.

Maybe can  you do something? It will be helpfull

@Makoto excellent tutorial, i give you my congratulations 
Just a quick note that i think you could add to this tutorial. If someone install's Centos 7 and then follows this tutorial, they will be installing PHP 5.4 which is currently EOL, and therefore no more security updates. Because this tut is all about security, i think the minimum version should be php 5.5.
So, you could add the instructions for installing Epel and Remi repo(its stays disabled by default), for example, and then the Yum command would be instead: yum --enablerepo=remi,remi-php56 php-fpm php-cli php-mysqlnd php-pdo php-gd php-mbstring php-xml.
If someone wants to try php 7.0, just change to remi-php70.
With the Remi repo we can also install php-pecl-imagick instead of using the pecl install.

Thanks for all the details. I'll have to investigate.

Try to open the plugin in a new page to edit, because there is a bug in ips codemirror field which is im using it in the custom HTML block