We want to see what plugins are used and what aren't. To profile this, we need plugin usage numbers in the feedback plugin reports.

An easy way to get a number that approximately corresponds to how often a plugin was used would be to count how many times a plugin was locked.

Adding it to I_S.FEEDBACK table reveals another problem. Currently it reports plugin versions as, say,

...

| Xxx | 1.2 |

...

for plugin "Xxx". To report usage counters we'll add another row like

...

| Xxx used | 1234 |

...

with the space in the name, to avoid possible clashes with anything from the show status or show variables.

For consistency, we'll report versions as

...

| Xxx version | 1.2 |

...