Generate multisig address

[rnicoll]

This adds the interim components and final generated address. The parts are:

• The sorted keys (using the sort) command.
• The sorted keys in a JSON array.
• A sample bash script which generates the address from the keys.
• The signed result.

[rnicoll]

Revised the signed text as I realised I can only state the address is what my node generates, we need independent verification to know it's generated correctly.

[patricklodder]

You can verify the redeemscript like this:

$ dogecoin-cli decodescript 53210234a28ac2f92ae7c1db6b4c28ccbb1561de162b8acbb366007213d4f3a3db9ddc21023e4dd516c1b3d05740e482578ad35c7026ae861ffa6630ad782ae92cf6267a7f2102dc4d6cbefa4d6b3317489b149544f5816c2ae96d26a847b3671be58d19be69912102e8091f9e22512cce2539fa24876da79e9a6af30fd5fcb861b652543f4a84d4972103afc00466490888ef51afbb0c2e8de8f63a85d92ebc5a7e9fa960c2890477a82455ae
{
  "asm": "3 0234a28ac2f92ae7c1db6b4c28ccbb1561de162b8acbb366007213d4f3a3db9ddc 023e4dd516c1b3d05740e482578ad35c7026ae861ffa6630ad782ae92cf6267a7f 02dc4d6cbefa4d6b3317489b149544f5816c2ae96d26a847b3671be58d19be6991 02e8091f9e22512cce2539fa24876da79e9a6af30fd5fcb861b652543f4a84d497 03afc00466490888ef51afbb0c2e8de8f63a85d92ebc5a7e9fa960c2890477a824 5 OP_CHECKMULTISIG",
  "reqSigs": 3,
  "type": "multisig",
  "addresses": [
    "D6pY4mEa4khQYU4NLzwPRBFDUpgc7YfmUh",
    "D5GhCoTsCirLSCWN7YCMHzWH3djCtAv6eB",
    "DRNQFjpCojFpxX5uiV3yGqx1X9QDdC93o5",
    "DDVLGvC3yZMjRZ3hjVWpX1nW6dFN1sqa1a",
    "DJZNEFsrqtjFbTG9xoNP1BjJmqMiHawSjs"
  ],
  "p2sh": "9xEP9voiNLw7Y7DS87M8QRqKM43r6r5KM5"
}