Add changelog entry for error handling added to get_execv_args. Closes #175

CHANGES.txt

@@ -1,6 +1,8 @@
 Next release
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+- Fixed a bug where parsing ``command=`` could cause supervisord to crash if
+  shlex.split() fails, such as a bad quoting.  Patch by Scott Wilson.
 
 3.0b1 (2012-09-10)
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