relnotes: Add release note about microcode stack traces.

diff --git a/src/relnotes/bug-ucode-stacktrace b/src/relnotes/bug-ucode-stacktrace
new file mode 100644 (file)
index 0000000..681b9f6
--- /dev/null
+++ b/src/relnotes/bug-ucode-stacktrace
@@ -0,0 +1,4 @@
+Bug fix: Microcode stack traces had been broken in the microcode v15
+merge in 2007.  They now work again, and the C code that abused enums
+to store pointers, which broke the build with newer compilers, has been
+fixed to work differently.