db from different files

### Step 1: Please describe your environment

* ZeroNet version: 0.6.4 r3741
* Operating system: Win
* Web browser: Chrom
* Tor status: not disabled
* Opened port: yes
* Special configuration: ____---------

### Step 2: Describe the problem:
I created a table and wanted to fill it with lines from a file

***** dbschema.json
"maps": {
"data-static/content-media.json": {
"to_table": [
{
"node": "files_optional",
"table": "files_optional"
}
]
}
},
******
as I understand it because of the file name content-media.json, rows are not added to the table. If the name is changed to data.json, then everything works fine.

Start by reproducing the mapping with dbschema.json and compare data-static/content-media.json with the working data.json case. Trace how the filename is matched to the table mapping and verify that rows from content-media.json are inserted into files_optional without changing the existing data.json behavior.

Written by the indexing model from the issue text.