nhrpd: Makefile.am needs to specify the headers, for dist tarballs to work
diff --git a/nhrpd/Makefile.am b/nhrpd/Makefile.am
index 00ecc7f..a9f70e2 100644
--- a/nhrpd/Makefile.am
+++ b/nhrpd/Makefile.am
@@ -32,4 +32,7 @@
 
 nhrpd_LDADD = ../lib/libzebra.la @LIBCAP@ @CARES_LIBS@
 
+noinst_HEADERS = debug.h netlink.h nhrpd.h vici.h znl.h list.h \
+	nhrp_protocol.h os.h zbuf.h
+
 #dist_examples_DATA = nhrpd.conf.sample