check: make sure all files outside contrib/ include "config.h" first.

And turn "" includes into full-path (which makes it easier to put
config.h first, and finds some cases check-includes.sh missed
previously).

config.h sets _GNU_SOURCE which really needs to be done before any
'#includes': we mainly got away with it with glibc, but other platforms
like Alpine may have stricter requirements.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

devtools/bolt11-cli.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <bitcoin/address.h>
 #include <bitcoin/base58.h>
 #include <bitcoin/privkey.h>

devtools/bolt12-cli.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <bitcoin/chainparams.h>
 #include <ccan/err/err.h>
 #include <ccan/opt/opt.h>

devtools/clean_topo.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <common/gossmap.h>
 #include <devtools/clean_topo.h>
 

devtools/create-gossipstore.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <ccan/crc32c/crc32c.h>
 #include <ccan/err/err.h>
 #include <ccan/opt/opt.h>

devtools/decodemsg.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <ccan/err/err.h>
 #include <ccan/opt/opt.h>
 #include <ccan/tal/grab_file/grab_file.h>

devtools/dump-gossipstore.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <ccan/crc32c/crc32c.h>
 #include <ccan/err/err.h>
 #include <ccan/opt/opt.h>

devtools/gossipwith.c

@@ -1,4 +1,5 @@
 /* Simple tool to route gossip from a peer. */
+#include "config.h"
 #include <bitcoin/block.h>
 #include <bitcoin/chainparams.h>
 #include <ccan/array_size/array_size.h>

devtools/lightning-checkmessage.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <bitcoin/pubkey.h>
 #include <bitcoin/shadouble.h>
 #include <ccan/err/err.h>

devtools/mkclose.c

@@ -4,6 +4,7 @@
  *
  * lightning/devtools/mkclose 189c40b0728f382fe91c87270926584e48e0af3a6789f37454afee6c7560311d 0 0.00999877btc 253 0.00999877btc 0000000000000000000000000000000000000000000000000000000000000010 0000000000000000000000000000000000000000000000000000000000000020 026957e53b46df017bd6460681d068e1d23a7b027de398272d0b15f59b78d060a9 03a9f795ff2e4c27091f40e8f8277301824d1c3dfa6b0204aa92347314e41b1033
  */
+#include "config.h"
 #include <bitcoin/script.h>
 #include <ccan/err/err.h>
 #include <ccan/str/hex/hex.h>

devtools/mkcommit.c

@@ -8,6 +8,7 @@
    0000000000000000000000000000000000000000000000000000000000000020 0000000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000021 0000000000000000000000000000000000000000000000000000000000000022 0000000000000000000000000000000000000000000000000000000000000023 0000000000000000000000000000000000000000000000000000000000000024 \
    0000000000000000000000000000000000000000000000000000000000000010 FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF 0000000000000000000000000000000000000000000000000000000000000011 0000000000000000000000000000000000000000000000000000000000000012 0000000000000000000000000000000000000000000000000000000000000013 0000000000000000000000000000000000000000000000000000000000000014
  */
+#include "config.h"
 #include <bitcoin/chainparams.h>
 #include <bitcoin/script.h>
 #include <ccan/cast/cast.h>

devtools/mkencoded.c

@@ -1,4 +1,5 @@
 /* Simple wrapper to create zlib or raw encodings of hex. */
+#include "config.h"
 #include <bitcoin/short_channel_id.h>
 #include <ccan/err/err.h>
 #include <ccan/str/hex/hex.h>

devtools/mkfunding.c

@@ -6,6 +6,7 @@
  *
  * lightning/devtools/mkfunding 16835ac8c154b616baac524163f41fb0c4f82c7b972ad35d4d6f18d854f6856b 3 0.03btc 253 16c5027616e940d1e72b4c172557b3b799a93c0582f924441174ea556aadd01c 0000000000000000000000000000000000000000000000000000000000000050 0000000000000000000000000000000000000000000000000000000000000060
  */
+#include "config.h"
 #include <bitcoin/script.h>
 #include <ccan/err/err.h>
 #include <ccan/str/hex/hex.h>

devtools/print_wire.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <ccan/mem/mem.h>
 #include <ccan/utf8/utf8.h>
 #include <common/decode_array.h>

devtools/print_wire.h

@@ -1,5 +1,6 @@
 #ifndef LIGHTNING_DEVTOOLS_PRINT_WIRE_H
 #define LIGHTNING_DEVTOOLS_PRINT_WIRE_H
+#include "config.h"
 #include <bitcoin/preimage.h>
 #include <bitcoin/tx.h>
 #include <common/wireaddr.h>

devtools/route.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <ccan/err/err.h>
 #include <ccan/opt/opt.h>
 #include <ccan/time/time.h>