* configure.ac: Actually name the option --disable-finger and not
http.  Add option --enable-selinux-support.
* logger.c (g10_log_error_f, g10_log_fatal_f, g10_log_info_f)
(g10_log_debug_f, print_prefix_f): Removed.
* iobuf.c (iobuf_is_pipe_filename): New.
(iobuf_get_fd): New.