Fix parsing of node public keys in manifest CLI:

The existing code attempts to validate the provided node public key
using a function that assumes that the encoded public key is for an
account. This causes the parsing to fail.

This commit fixes #3317 by letting the caller specify the type of
the public key being checked.

src/ripple/app/misc/NetworkOPs.cpp

@@ -1915,6 +1915,7 @@ NetworkOPsImp::pubManifest(Manifest const& mo)
         jvObj[jss::master_signature] = strHex(mo.getMasterSignature());
         if (!mo.domain.empty())
             jvObj[jss::domain] = mo.domain;
+        jvObj[jss::manifest] = strHex(mo.serialized);
 
         for (auto i = mStreamMaps[sManifests].begin();
              i != mStreamMaps[sManifests].end();)

src/ripple/net/impl/RPCCall.cpp

@@ -151,9 +151,11 @@ class RPCParser
     }
 
     static bool
-    validPublicKey(std::string const& strPk)
+    validPublicKey(
+        std::string const& strPk,
+        TokenType type = TokenType::AccountPublic)
     {
-        if (parseBase58<PublicKey>(TokenType::AccountPublic, strPk))
+        if (parseBase58<PublicKey>(type, strPk))
             return true;
 
         auto pkHex = strUnHex(strPk);
@@ -235,7 +237,7 @@ class RPCParser
             Json::Value jvRequest(Json::objectValue);
 
             std::string const strPk = jvParams[0u].asString();
-            if (!validPublicKey(strPk))
+            if (!validPublicKey(strPk, TokenType::NodePublic))
                 return rpcError(rpcPUBLIC_MALFORMED);
 
             jvRequest[jss::public_key] = strPk;