Do not preserve /etc/planetlab on upgrade operations
bootcd-GITPATH := git://git.verivue.com/planetlab/bootcd.git@bootcd-4.2-25
vserver-reference-GITPATH := git://git.verivue.com/planetlab/vserver-reference@vserver-reference-4.2-18
bootstrapfs-GITPATH := git://git.verivue.com/planetlab/bootstrapfs.git@BootstrapFS-1.0-12
-myplc-GITPATH := git://git.verivue.com/planetlab/myplc@myplc-4.3-49
+myplc-GITPATH := git://git.verivue.com/planetlab/myplc@myplc-4.3-50
pyopenssl-GITPATH := git://git.verivue.com/planetlab/pyopenssl.git@pyopenssl-0.9-1
# locating the right test directory - see make tests_gitpath