Conflicts:
	src/webclient/mwpoll.c

It no longer makes sense to use userposn as a source and destination
field when passing messages, so drop it entirely.
Instead specify an 'audience' for the message so the server
knows how to distribute it.

Still nowhere near finished, but the main edit commands have moved,
      and frameworks have been started for the other parts

Sometimes it's useful to run the server in the foreground quietly.

1. incoming_pipe is -1 in idle() when a new user runs mw with autochat
2. When ls() tries to write too many chars into a SUBJECTSIZE+1-char
   buffer.

Fixes #24

Fixes:

  servsock.c: In function ‘migrate_old_folders’:
  servsock.c:684:2: error: ‘readdir_r’ is deprecated [-Werror=deprecated-declarations]
    while (readdir_r(dirp, &entry, &dp) == 0) {
    ^~~~~

Fixes:

  talk{0}-* !w
  Writing in folder Foo.
  Message from andy
  *** buffer overflow detected ***: /home/andy/src/mw/src/client/mw
  terminated

When display_message gets to this point, ptr might have been incremented
to its end of line value and so the loop is terminated without printing
the message. Instead, jump down to the last section of the loop where it
checks for end of line and prints the message.

(This function could really do with refactoring to avoid this goto and
make it more readable but for now this will do.)

It no longer makes sense to use userposn as a source and destination
field when passing messages, so drop it entirely.
Instead specify an 'audience' for the message so the server
knows how to distribute it.

Still nowhere near finished, but the main edit commands have moved,
      and frameworks have been started for the other parts

sprintf(out,"%2ldd%2ldh",t/86400, (t%86400)/3600); overflowed static char out[7] when t > 100days as %2ld only states a minimum width.
Changed out to allow for the longest possible string that sprintf can make from a 64bit unsigned long '106751991167300d15h' (20 chars including the null)
Fixes #22