can open and read from TTY.
doesn't do anything with the data yet.
doesn't write proper packets to the interface yet.
doesn't use bitrate config option yet.
Output is same format as "keyring add" command
Fixed minor bug in rolling a random DID -- last byte was not random
Some code improvements, including better support for sid_t
Replace explicit [<pin,pin...>] command-line arguments with --entry-pin=<pin>
options. Update test scripts accordlingly.
Add --keyring-pin=<pin> option (with one test case).
Change a test case: configuration options are now case sensitive.
Fix config file load and parse logic in conf.c, always copy 'debug' flags
from config.debug.
The config schema 'interfaces' option is no longer MANDATORY.
Introduce new CLIFLAG_PERMISSIVE_CONFIG to supress bad-config ERROR messages
from the 'config set' and 'config get' commands.
Refactor cli_execute() into cli_parse() and cli_invoke(). Use *const* struct
command_line_option everywhere.
The new header "os.h" defines a supplemental API around existing basic
operating system services (system calls and standard library functions).
Moved some function prototypes from serval.h and net.h into os.h.
This allows non-servald executables to take advantage of this API without
having to include serval.h and bringing in all the other servald link-time
baggage.
Move alloca_tohex() from serval.h into str.h so it can be used stand-alone.
Rename str_to_ll_scaled() to str_to_int64_scaled(). Add str_to_uint64_scaled()
and scale_factor().
Add a few more URI parsing functions. Move some functions out of str.c and
into str.h as inline functions.
Add __whence args to fd_func_enter() and fd_func_exit() so that their log
messages get reported from the location of the IN() or OUT() macro, not a line
in performance_timing.c.
Removed diagnostic information from the FATAL() message in fd_func_exit(), and
a comment explaining why (causes SEGV).
Move lots of non-Serval-specific string functions from "serval.h"/dataformats.c
to "str.h"/str.c.
Add str_fromprint() function that reverses the effect of toprint(): interprets
escape sequences in the source string "\n\t\r\0\xHH\\" and replaces them with a
single char in the destination string.
