undo opaque=fopaque changes; make test script more flexible

Demo/rpc/test

 : ${PYTHON=python}
+: ${SERVER=charon.cwi.nl}
 
 set -xe
 
 $PYTHON -c 'from rpc import test; test()'
-$PYTHON -c 'from rpc import test; test()' charon.cwi.nl
+$PYTHON -c 'from rpc import test; test()' ${SERVER}
 
 $PYTHON -c 'from rpc import testsvr; testsvr()' &
-SVR=$!
+PID=$!
 sleep 2
 $PYTHON -c 'from rpc import testclt; testclt()'
-kill -2 $SVR
+kill -2 $PID
 
 $PYTHON -c 'from mountclient import test; test()'
 $PYTHON -c 'from mountclient import test; test()' gatekeeper.dec.com

Demo/rpc/xdr.py

@@ -69,7 +69,7 @@ class Packer:
 		self.pack_uint(n)
 		self.pack_fstring(n, s)
 
-	pack_opaque = pack_fopaque
+	pack_opaque = pack_string
 
 	def pack_list(self, list, pack_item):
 		for item in list:
@@ -176,7 +176,7 @@ class Unpacker:
 		n = self.unpack_uint()
 		return self.unpack_fstring(n)
 
-	unpack_opaque = unpack_fopaque
+	unpack_opaque = unpack_string
 
 	def unpack_list(self, unpack_item):
 		list = []