Message about first block chain synchronization

[hitobb]

Describe the issue

I would like to add the following message to getinfo output.

Only at the first startup.
It may take several days before block chain synchronization begins for the caching the block header hash.

Can you reliably reproduce the issue?

No.
This is my opinion about feature request.
I would like to discuss here.

Expected behaviour

Many comments from bitzenyd users arrived that "bitzenyd block chain synchronization is not starting on z 2.0.0."

Actual behaviour

After the hash cache is completed, bitzenyd blockchain synchronization is starting .
This is the correct behavior.

Therefore,
I think it is better to add Information the output of getinfo command.

What version of bitcoin-core are you using?

z2.0.0

Any extra information that might be useful in the debugging process.

It is better to replace the message deleted by #24

"deprecation-warning", "WARNING: getinfo is deprecated and will be fully removed in 0.16." 
     " Projects should transition to using getblockchaininfo, getnetworkinfo, and getwalletinfo before upgrading to 0.16"

This is my opinion about feature request.
I would like to discuss here.

Thank you!

boo!

• The endpoint will be removed in next release.
• It is the well-known issue and also described in the release note.

If you want, you should add the message to another place.

[hitobb]

OK,I understand.
Thank you!