make buildworld edits contrib/unbound/util/configparser.c on stable-10

[Steven Hartland]

Was just about to commit a change to stable-10 when
I noticed at the last second that just doing a make
buildworld had edited the source file:
contrib/unbound/util/configparser.c

It seems its overwritten it with a generated version
specific to my environment e.g.
svn diff contrib/unbound/util/configparser.c |more
Index: contrib/unbound/util/configparser.c
===================================================================
--- contrib/unbound/util/configparser.c (revision 257053)
+++ contrib/unbound/util/configparser.c (working copy)
@@ -15,7 +15,7 @@
 #define YYPURE 0
-#line 39 "util/configparser.y"
+#line 39 "/usr/home/smh/freebsd/base/stable/10/lib/libunbound/../../contrib/unbound/util/configparser.y"
 #include "config.h"
...

Obviously quite a nasty little gotcha as I could have
easily broken the build by checking this unknown change
in by mistake.

@des: sent to you direct as it looks like you did the initial
import of unbound so may know whats going on?

    Regards
    Steve

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