* assuan-support.c (my_spawn): Cast to avoid warning.
* engine-g13.c (g13_new): Make ARGV array of pointer to const
char.
(g13_assuan_simple_command) [!USE_DESCRIPTOR_FUNCTION]: Don't define.
* ops.h (_gpgme_key_append_name): Same in prototype.
* key.c (_gpgme_key_append_name): Make SRC argument pointer to
const char.
* posix-util.c (_gpgme_get_uiserver_socket_path): Make HOMEDIR
const.
* vfs-mount.c (gpgme_op_vfs_transact_start): Never define this
potentially useful but currently unused function.
* vfs-create.c (gpgme_op_vfs_transact_start): Likewise.
* engine-g13.c (struct engine_g13): Remove members RESULT_CB and
RESULT_CB_VALUE.
(g13_assuan_simple_command, status_handler): Don't use those anymore.
(g13_transact): Remove them from argument list, too.
* vfs-mount.c (_gpgme_vfs_mount_status_handler): New function.
(_gpgme_op_vfs_mount): Pass it to transact.
