context argument.
(do_read_sexp): Pass HANDLER_CONTEXT.

* src/sexp.c (lookup_sexp_format): Use strcmp rather than
strcasecmp.
(sexp_input_argp, sexp_output_argp): Split sexp_argp into two
parsers.

* src/server_userauth.c (make_exc_userauth_handler): Added context
argument.
(do_userauth): Pass HANDLER_CONTEXT.

* src/server_session.c (do_spawn_shell): Pass HANDLER_CONTEXT.

Rev: src/read_data.h:1.11
Rev: src/server_session.c:1.19
Rev: src/server_userauth.c:1.20
Rev: src/sexp.c:1.17
Rev: src/sexp.h:1.20
Rev: src/sexp_commands.c:1.3
Rev: src/sexp_streamed_parser.c:1.14