- now creates a log entry that the user sent a telegram to somebody
- if a destination user number is not specified, one is prompted for
- the destination user number is compared against the current user's
  restrictions (e.g. F-restricted users can't telegram the sysop)
- if a telegram message text is not specified, one is prompted for

unrelated fix to bbs.list_msgs(): if a 'find' argument was passed, too many
increments of argn in call to macro: JSVALUE_TO_MSTRING