* assuan-buffer.c (writen, readline): Use the new functions
instead of pth.
* assuan-socket-server.c (accept_connection): Don't use the
pth_accept - using the assuan included accept code would be a bad
idea within Pth so we don't need a replacement function.
* assuan-pipe-connect.c: this.
(assuan_pipe_disconnect): Removed.
(do_finish, do_deinit): New
(assuan_pipe_connect): and set them into the context.
* assuan-socket-connect.c: New.
* assuan-util.c (_assuan_log_sanitized_string): New.
* assuan-pipe-server.c (assuan_init_pipe_server): Factored most
code out to ...
(_assuan_new_context): new func.
(_assuan_release_context): New
* assuan-connect.c (assuan_pipe_connect): Use the new functions.
* assuan-handler.c (std_handler_option): New.
(std_cmd_tbl): Add OPTION as standard command.
(assuan_register_option_handler): New.
(dispatch_command): Use case insensitive matching as a fallback.
(my_strcasecmp): New.
handshake.
* assuan-client.c (read_from_server): Renamed to
(_assuan_read_from_server): this and made external.
* assuan-listen.c (assuan_set_hello_line): New.
(assuan_accept): Use a custom hello line is available.
* assuan-buffer.c (assuan_read_line): New.
(assuan_pending_line): New.
(_assuan_write_line): Renamed to ..
(assuan_write_line): this, made public and changed all callers.
