Add 'make seeds' to make it easy to add seeds

Makefile.am

@@ -247,6 +247,9 @@ DISTCHECK_CONFIGURE_FLAGS = --enable-man
 clean-local:
 	rm -rf test_bitcoin.coverage/ total.coverage/
 
+seeds:
+	./contrib/seeds/generate-seeds.py contrib/seeds > src/chainparamsseeds.h
+
 manpages:
 	./util/gen-manpages.sh
 	@echo "Please review the man pages changes to see if they look correct, then commit and push"

contrib/seeds/generate-seeds.py

@@ -164,7 +164,9 @@ def main():
     g.write('// Distributed under the GPLv3 software license, see the accompanying\n')
     g.write('// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html\n')
     g.write('// THIS FILE IS AUTOGENERATED, DO NOT MODIFY DIRECTLY\n')
-    g.write('// Instead, run: ./contrib/seeds/generate-seeds.py contrib/seeds\n')
+    g.write('// Instead, update contrib/seeds/nodes_main.txt then run\n')
+    g.write('//    ./contrib/seeds/generate-seeds.py contrib/seeds > src/chainparamsseeds.h\n')
+    g.write('// OR run: make seeds\n')
     g.write('#ifndef HUSH_CHAINPARAMSSEEDS_H\n')
     g.write('#define HUSH_CHAINPARAMSSEEDS_H\n')
     g.write('// List of fixed seed nodes for the Hush network\n')

src/chainparamsseeds.h

@@ -2,7 +2,9 @@
 // Distributed under the GPLv3 software license, see the accompanying
 // file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 // THIS FILE IS AUTOGENERATED, DO NOT MODIFY DIRECTLY
-// Instead, run: ./contrib/seeds/generate-seeds.py contrib/seeds
+// Instead, update contrib/seeds/nodes_main.txt then run
+//    ./contrib/seeds/generate-seeds.py contrib/seeds > src/chainparamsseeds.h
+// OR run: make seeds
 #ifndef HUSH_CHAINPARAMSSEEDS_H
 #define HUSH_CHAINPARAMSSEEDS_H
 // List of fixed seed nodes for the Hush network