sysutils/rsyslog8: update to 8.2506.0

Delete files/patch/plugins_{i,o}mdtls_{i,o}mdtls.c -- patch accepted by upstream and incorporated in this release.

Add patch derived from
https://github.com/rgerhards/rsyslog/commit/72b8bcc05318f0a72ec828d1a5329fa98c021eb8

• since FreeBSD (like Solaris) doesn't provide a UT_LINESIZE constant

in utmpx.h

Regenerate patches.

Changes: https://github.com/rgerhards/rsyslog/blob/v8.2506.0/ChangeLog
Reported by: repology