Name core tests consistently

Now, given a concept xyz,
* the main test file is called test_xyz.cc
* the executable is called test_xyz, and
* the ctest test is called text_xyz.

server/core/test/test_maxpasswd.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Create a temporary directory: /tmp/tmp.<random>
+SECRETS_DIR=`mktemp -d`
+
+# Generate a .secrets file.
+../maxkeys ${SECRETS_DIR} || exit 1
+
+# Generate a key.
+KEY=`../maxpasswd ${SECRETS_DIR} dummy`
+
+# Remove the temporary directory.
+rm -rf ${SECRETS_DIR}
+
+# Get the length of the generated KEY.
+LENGTH=${#KEY}
+
+if [ ${LENGTH} -eq 32 ]
+then
+    # Exactly 32 characters => Ok!
+    exit 0
+else
+    # Something else; chances are maxpasswd outputs garbage.
+    exit 1
+fi