typo fixes found by @niftynei

Also, put the "added" lines in the request schemas for new commands:
this doesn't do anything (yet?) but it keeps `make schema-added-check` happy.

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

common/gossip_store.h

@@ -50,7 +50,7 @@ struct gossip_rcvd_filter;
  */
 struct gossip_hdr {
 	beint16_t flags; /* Length of message after header. */
-	beint16_t len; /* Length of message after header. */
+	beint16_t len; /* GOSSIP_STORE_xxx_BIT flags. */
 	beint32_t crc; /* crc of message of timestamp, after header. */
 	beint32_t timestamp; /* timestamp of msg. */
 };

doc/lightning-listsqlschemas.7.md

@@ -84,7 +84,7 @@ On success, an object containing **schemas** is returned.  It is an array of obj
 
 - **tablename** (string): the name of the table
 - **columns** (array of objects): the columns, in database order:
-  - **name** (string): the name the column
+  - **name** (string): the name of the column
   - **type** (string): the SQL type of the column (one of "INTEGER", "BLOB", "TEXT", "REAL")
 - **indices** (array of arrays, optional): Any index we created to speed lookups:
   - The columns for this index:
@@ -106,4 +106,4 @@ RESOURCES
 ---------
 
 Main web site: <https://github.com/ElementsProject/lightning>
-[comment]: # ( SHA256STAMP:3ac985dd8ef6959b327e6e6a79079db3ad51423bc4e469799a12ae74b2e75697)
+[comment]: # ( SHA256STAMP:29ce2ff3f7cab8a4a90d09fa02fa8176008413272d46c0fe7faa6216f11bb2c6)

doc/schemas/listsqlschemas.request.json

@@ -2,6 +2,7 @@
   "$schema": "http://json-schema.org/draft-07/schema#",
   "type": "object",
   "required": [],
+  "added": "v23.02",
   "properties": {
     "table": {
       "type": "string"

doc/schemas/listsqlschemas.schema.json

@@ -33,7 +33,7 @@
               "properties": {
                 "name": {
                   "type": "string",
-                  "description": "the name the column"
+                  "description": "the name of the column"
                 },
                 "type": {
                   "type": "string",

doc/schemas/sql.request.json

@@ -4,6 +4,7 @@
   "required": [
     "query"
   ],
+  "added": "v23.02",
   "properties": {
     "query": {
       "type": "string"