clarify regression testing

tests/README

@@ -8,6 +8,7 @@ verify basic functionality of the LDAP libraries, slapd, and slurpd.
 	To run SQL tests, define SLAPD_USE_SQL=<rdbms> and type
 		"make sql"; define SLAPD_USE_SQLWRITE=yes
 		to enable write tests as well.
+	To run regression tests, type "make regressions"
 
 The test scripts depends on a number of tools commonly available on
 Unix (and Unix-like) systems.  While attempts have been made to make

tests/data/regressions/README

@@ -12,3 +12,7 @@ otherwise, if the issue appears whatever backend is used, the test should
 be parametric, so that it is run with the backend selected at run-time
 via the "-b" switch of the "run" script.
 
+Regression tests are prepared on a voluntary basis, so don't expect all 
+bugs to have a test any soon.  When the issue reporter provides a simple,
+yet complete means to reproduce the bug she's reporting, this may speed up 
+the process.  In case, only put neutral data in bug exploitation reports.

tests/data/regressions/its4184/its4184

@@ -64,6 +64,13 @@ if test $RC != 0 ; then
 	exit $RC
 fi
 
+echo ""
+echo "	This test applies a round of updates __after__ grabbing a lock"
+echo "	that, before the fix, was not correctly released; in case "
+echo "	of failure, the second round of updates will deadlock."
+echo "	This issue was fixed in OpenLDAP 2.3.14."
+echo ""
+
 for S in 1 2 ; do
 	FILE="${ITSDIR}/mods.ldif"
 	echo "${S}) Applying `basename ${FILE}`..."