pbuilderrc: change APTGETOPT to "--force-yes" only

pbuilderrc

 HOOKDIR="$HOME/pbuilder/hooks"
 PBUILDERSATISFYDEPENDSCMD="/usr/lib/pbuilder/pbuilder-satisfydepends-gdebi"
 EXTRAPACKAGES="eatmydata debhelper autoconf autotools-dev man-db fakeroot ccache"
-#APTGETOPT="--force-yes"
-APTGETOPT="--allow-unauthenticated"
+APTGETOPT="--force-yes"
 AUTOCLEANAPTCACHE=yes
 
 # Use eatmydata in chroots (will cause chroot creation failure for pre-maverick chroots)
-# make sure to install eatmydata outside the chroot
+# make sure to install eatmydata outside and inside the chroot
+# to comment out while bootsrapping
 export LD_PRELOAD="${LD_PRELOAD:+$LD_PRELOAD:}/usr/lib/libeatmydata/libeatmydata.so"
 
 # To use with a "tmpfs	/var/cache/pbuilder/build	tmpfs	defaults,size=2400M	0	0"-like fstab entry