dnf.conf: update for dnf5 (which defaults to empty)

etc/dnf/dnf.conf

@@ -1,13 +1,16 @@
+# see `man dnf.conf` for defaults and possible options
+
 [main]
-gpgcheck=1
+# The above is the Fedora 41 default config for dnf5. The below is notes on my
+# additions to it.
+
 # 3 is the default, increase this in case of kernel upgrade trouble (unrelated
 # to space, see dracut.conf.d for that)
 #installonly_limit=3
 clean_requirements_on_remove=True
 # The --best flag could be specified here, but default is False
 #best=True
-best=False
-skip_if_unavailable=True
+#skip_if_unavailable=True
 
 # Find the mirror with the lowest ping. While this might be the closest
 # mirror, this won't consider the available bandwidth which may result into
@@ -32,6 +35,3 @@ max_parallel_downloads=6
 # Zaldaryn has small root partition and cannot cache enough for family
 # booting it with long intervals
 #cachedir=/home/dnfcache/
-
-# More verbose output
-debuglevel=10