mod_pastebin: Normalize markdown [fix] md:command=pandoc -f markdown-smart+emoji -s -t markdown-smart+emoji+pipe_tables+simple_tables-multiline_tables-grid_tables-raw_html md:pattern=set:**.md + **.markdown

This module blocks configured queries that change server state.

E.g. to make vCard storage read-only:

``` lua
readonly_stores = {
	vcard = { "vcard-temp", "vCard" };
}
```