Merge #17302: cli: Add "headers" and "verificationprogress" to -getinfo

3187934 cli: Add "headers" and "verificationprogress" to -getinfo (Wladimir J. van der Laan)

Pull request description:

  These values are useful to know the current progress of initial sync, or of catching up, which is arguably the use of a quick `-getinfo` command.

ACKs for top commit:
  MarcoFalke:
    unsigned ACK 3187934
  jonasschnelli:
    utACK 3187934
  jonatack:
    Tested ACK 3187934 on Debian 4.19.37-5+deb10u2 (2019-08-08) x86_64 GNU/Linux

Tree-SHA512: 185180ab426b4db5d99eb208ee88d1606f585361875ba3a92b6c28a74fe181d72ed710c8859b969ba49b1ca7d2385695932b79ff621c7a2a7cedd0df717a99ed

Author: laanwj

src/bitcoin-cli.cpp

@@ -258,6 +258,8 @@ class GetinfoRequestHandler: public BaseRequestHandler
         result.pushKV("version", batch[ID_NETWORKINFO]["result"]["version"]);
         result.pushKV("protocolversion", batch[ID_NETWORKINFO]["result"]["protocolversion"]);
         result.pushKV("blocks", batch[ID_BLOCKCHAININFO]["result"]["blocks"]);
+        result.pushKV("headers", batch[ID_BLOCKCHAININFO]["result"]["headers"]);
+        result.pushKV("verificationprogress", batch[ID_BLOCKCHAININFO]["result"]["verificationprogress"]);
         result.pushKV("timeoffset", batch[ID_NETWORKINFO]["result"]["timeoffset"]);
         result.pushKV("connections", batch[ID_NETWORKINFO]["result"]["connections"]);
         result.pushKV("proxy", batch[ID_NETWORKINFO]["result"]["networks"][0]["proxy"]);