Add ip flag to daemon command

[silvanocerza]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)

• What kind of change does this PR introduce?

Adds a new flag to an existing command.

• What is the current behavior?

A user running daemon has no way of setting a custom IP.

• What is the new behavior?

A user can now use the --ip flag to use a custom IP to listen for gRPC requests.

• Does this PR introduce a breaking change, and is
  titled accordingly?

Nope.

• Other information:

This flag was also introduced in #1622 but it won't be merged into master until the whole configs migration is finished.
Since this is small change and has been asked by the community we decided it was worth releasing it before the whole configs migration.

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[silvanocerza]

@4ntoine #1622 won't be released for the time being so I made this new PR to set a custom IP.