[PATCH 4/5] build: fix manpage collection

[Jan Engelhardt <jengelh@medozas.de>]

Florian Westphal points out that v1.4.3.2-9-gc304d77 greps for the
keyword in the wrong file, and that files with NFPROTO_UNSPEC are
skipped.

This patch corrects that part, and makes `make` now output the
manpages it collected.

Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
---
 extensions/GNUmakefile.in |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/extensions/GNUmakefile.in b/extensions/GNUmakefile.in
index 8d7f21d..e1f1f49 100644
--- a/extensions/GNUmakefile.in
+++ b/extensions/GNUmakefile.in
@@ -161,13 +161,16 @@ man_run    = \
 	${AM_VERBOSE_GEN} \
 	for ext in $(1); do \
 		f="${srcdir}/libxt_$$ext.man"; \
-		if [ -f "$$f" ] && grep -q "$(3)" "$$f"; then \
+		cf="${srcdir}/libxt_$$ext.c"; \
+		if [ -f "$$f" ] && grep -Eq "$(3)|NFPROTO_UNSPEC" "$$cf"; then \
+			echo -e "\t+ $$f" >&2; \
 			echo ".SS $$ext"; \
 			cat "$$f"; \
 			continue; \
 		fi; \
 		f="${srcdir}/lib$(2)t_$$ext.man"; \
 		if [ -f "$$f" ]; then \
+			echo -e "\t+ $$f" >&2; \
 			echo ".SS $$ext"; \
 			cat "$$f"; \
 			continue; \
-- 
1.6.3.1