port closed - use normal files for W2W communication

[jaros1]

Now using optional files in MoneyNetworkAPI for wallet to wallet communication.
Other wallet fileGet operation will hang forever in case of closed ZeroNet port.
Use normal files for wallet to wallet communication in case of closed port.
Must be very small and very few files (normal files are replicated to all ZeroNet clients).

[jaros1]

Simple solution.
Client X cannot read optional file b. X adds filename to missing files array in wallet.json + publish.
Client Y with file b sees request from X, deletes optional files and writes b as a normal file + publish.
Client X reads normal while b, removes b from missing files + publish
Client Y with file b sees that file b has been removed from missing files and deletes normal file b.
Rest of communication for this wallet to wallet session should be done with normal files instead of optional files.

Add a filetype to money transaction filenames:
{session filename}.{timestamp} = normal file (always distributed)
{session filename}-i.{timestamp} = internal optional files (no distribution help needed)
{session filename}-e.{timestamp} = external optional files (distribution help would be nice)
{session filename}-o.{timestamp} = offline transaction (external optional files and distribution help would be nice)

[jaros1]

• Could be a send_message option. change "-o" offline to "." in case of closed port.
• could be a check box in W2 UI. Detected closed zeroNet port. Use normal files for money transactions. Changed max_size for normal files from 300000 to 50000 (about 30 money transaction files).
• could be special wallet data hubs for people with zeronet port closed