6fee63fc34 made `htlc_maximum_msat`
compulsory, which was the last "optional" field. All future options
will be TLVs, so we never need to parse the "] (optionxxx)" format
for fields again.
We allow options for messages, but only for documentation (we have
some messages which are only for `gossip_queries`), so we don't
put it in the output.
Here's the before/after diff of the output for all the spec files:
```diff
--- /tmp/before 2023-04-27 14:21:07.417170213 +0930
+++ /tmp/after 2023-04-27 14:19:39.184573086 +0930
@@ -273,7 +273,7 @@
msgdata,channel_update,fee_base_msat,u32,
msgdata,channel_update,fee_proportional_millionths,u32,
msgdata,channel_update,htlc_maximum_msat,u64,
-msgtype,query_short_channel_ids,261,gossip_queries
+msgtype,query_short_channel_ids,261
msgdata,query_short_channel_ids,chain_hash,chain_hash,
msgdata,query_short_channel_ids,len,u16,
msgdata,query_short_channel_ids,encoded_short_ids,byte,len
@@ -281,17 +281,17 @@
tlvtype,query_short_channel_ids_tlvs,query_flags,1
tlvdata,query_short_channel_ids_tlvs,query_flags,encoding_type,byte,
tlvdata,query_short_channel_ids_tlvs,query_flags,encoded_query_flags,byte,...
-msgtype,reply_short_channel_ids_end,262,gossip_queries
+msgtype,reply_short_channel_ids_end,262
msgdata,reply_short_channel_ids_end,chain_hash,chain_hash,
msgdata,reply_short_channel_ids_end,full_information,byte,
-msgtype,query_channel_range,263,gossip_queries
+msgtype,query_channel_range,263
msgdata,query_channel_range,chain_hash,chain_hash,
msgdata,query_channel_range,first_blocknum,u32,
msgdata,query_channel_range,number_of_blocks,u32,
msgdata,query_channel_range,tlvs,query_channel_range_tlvs,
tlvtype,query_channel_range_tlvs,query_option,1
tlvdata,query_channel_range_tlvs,query_option,query_option_flags,bigsize,
-msgtype,reply_channel_range,264,gossip_queries
+msgtype,reply_channel_range,264
msgdata,reply_channel_range,chain_hash,chain_hash,
msgdata,reply_channel_range,first_blocknum,u32,
msgdata,reply_channel_range,number_of_blocks,u32,
@@ -310,7 +310,7 @@
subtype,channel_update_checksums
subtypedata,channel_update_checksums,checksum_node_id_1,u32,
subtypedata,channel_update_checksums,checksum_node_id_2,u32,
-msgtype,gossip_timestamp_filter,265,gossip_queries
+msgtype,gossip_timestamp_filter,265
msgdata,gossip_timestamp_filter,chain_hash,chain_hash,
msgdata,gossip_timestamp_filter,first_timestamp,u32,
msgdata,gossip_timestamp_filter,timestamp_range,u32,
```
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
aad959a297