changes.src: update list of changes since 2.14
diff --git a/doc/changes.src b/doc/changes.src
index 1bc8f2a..8e0bc06 100644
--- a/doc/changes.src
+++ b/doc/changes.src
@@ -31,6 +31,12 @@
\b Fix \c{-E} in combination with \c{-MD}. See \k{opt-E}.
+\b Fix missing errors on redefined labels; would cause convergence
+failure instead which is very slow and not easy to debug.
+
+\b Duplicate definitions of the same label \e{with the same value} is now
+explicitly permitted (2.14 would allow it in some circumstances.)
+
\S{cl-2.14} Version 2.14
\b Changed \c{-I} option semantics by adding a trailing path separator