Maintaining process clarification

Hi,

I am new to OpenBSD and after 15 years of work with linux i find OpenBSD as very refreshing experience among bloated server software platforms, so guys thanks for that.

My questions is about updating packages using pkg_add -u , i am kind of confused about how it works.
Example: In 6.1 there is package openvpn-2.4.1, how updates to the package are handled? If there is critical issue with the package, then "openvpn-2.4.1" is updated or it get new version numbering? I have used to that distros add own numbering like 2.4.1_u1 and so one - to give a clue that package was updated/patched.

And yes - i know i can recompile by myself and i do not mind doing that, but i would avoid recompiling almost all all the time if there is already process

thanks,

_
Zbyszek Żółkiewski