We read in the manual https://www.freebsd.org/doc/handbook/updating-upgrading-freebsdupdate.html the following:
And then, after the failed merge one must begin the whole story with very long steps (system inspecting, patch download, patch applying, blah, blah) from the begining?!
Once all the patches have been downloaded to the local system, they will be applied. This process may take a while, depending on the speed and workload of the machine. Configuration files will then be merged. The merging process requires some user intervention as a file may be merged or an editor may appear on screen for a manual merge. The results of every successful merge will be shown to the user as the process continues. A failed or ignored merge will cause the process to abort. Users may wish to make a backup of /etc and manually merge important files, such as master.passwd or group at a later time.
And then, after the failed merge one must begin the whole story with very long steps (system inspecting, patch download, patch applying, blah, blah) from the begining?!