configs/*/pacman.conf: update configuration file for pacman 6

Based on https://github.com/archlinux/svntogit-packages/blob/accc1d210133a933f2b26e0aad842c27d00c8b0c/trunk/pacman.conf

Implements #136 (closed).

configs/baseline/pacman.conf

@@ -33,10 +33,11 @@ Architecture = auto
 # Misc options
 #UseSyslog
 #Color
-#TotalDownload
+#NoProgressBar
 # We cannot check disk space from within a chroot environment
 #CheckSpace
 #VerbosePkgLists
+#ParallelDownloads = 5
 
 # By default, pacman accepts packages signed by keys that its local keyring
 # trusts (see pacman-key and its man page), as well as unsigned packages.