[syslinux-iso] Update overlay pacman.conf

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

configs/syslinux-iso/overlay/etc/pacman.conf

@@ -17,7 +17,7 @@ HoldPkg     = pacman glibc
 # If upgrades are available for these packages they will be asked for first
 SyncFirst   = pacman
 #XferCommand = /usr/bin/wget --passive-ftp -c -O %o %u
-#XferCommand = /usr/bin/curl -C - %u > %o
+#XferCommand = /usr/bin/curl -C - -f %u > %o
 #CleanMethod = KeepInstalled
 Architecture = auto
 
@@ -33,6 +33,7 @@ Architecture = auto
 #ShowSize
 #UseDelta
 #TotalDownload
+#CheckSpace
 
 #
 # REPOSITORIES
@@ -58,23 +59,18 @@ Architecture = auto
 # after the header, and they will be used before the default mirrors.
 
 #[testing]
-## Add your preferred servers here, they will be used first
 #Include = /etc/pacman.d/mirrorlist
 
 [core]
-# Add your preferred servers here, they will be used first
 Include = /etc/pacman.d/mirrorlist
 
 [extra]
-# Add your preferred servers here, they will be used first
 Include = /etc/pacman.d/mirrorlist
 
 #[community-testing]
-## Add your preferred servers here, they will be used first
 #Include = /etc/pacman.d/mirrorlist
 
 [community]
-# Add your preferred servers here, they will be used first
 Include = /etc/pacman.d/mirrorlist
 
 # An example of a custom package repository.  See the pacman manpage for