freshclam's db file permissions

[patch-work]

Freshclam changes permissions to local db files and remote db files differently.

Example rule for a local db file:

DatabaseCustomURL file:///var/db/clamav/example.yara

I set the file as follows, as a test:

-rw-r--r-- 1 root _clamav 410441 Dec 20 22:17 example.yara

After running freshclam, the file becomes as follows:

-rw------- 1 _clamav wheel 410441 Dec 20 22:17 example.yara

The other files, downloaded from remote stores, look as follows:

-rw-r--r-- 1 _clamav _clamav 51490 Dec 20 18:19 spamimg.hdb

Why is freshclam doing this to local files?