--- a/bin/update	Fri Feb 27 17:56:16 2015 +0200
+++ b/bin/update	Fri Feb 27 18:07:32 2015 +0200
@@ -1,10 +1,12 @@
 #!/bin/bash
 
-SRV=${SRV:-.}
-SRC=${OPT:-.}
+# absolute path to directory with etc/ and var/
+SRV=${SRV:-$(pwd)}
+
+# path (relative to $SRV) to directory with bin/
 OPT=${OPT:-./opt}
-ETC=${ETC:-$SRV/etc}
-LIB=${LIB:-$SRC/lib}
-VAR=${VAR:-$SRV/var}
+
+# path (relative to $SRV) to lib/ directory with pvl/
+LIB=${LIB:-./lib}
 
 . $LIB/pvl/hosts/update.sh