* cp-abi.c: Include "command.h", "gdbcmd.h", and "ui-out.h".

	* cp-abi.c: Include "command.h", "gdbcmd.h", and "ui-out.h".
	(auto_cp_abi): New variable.
	(current_cp_abi, num_cp_abis): Make static.
	(CP_ABI_MAX): Define.
	(cp_abis): Turn into an array.
	(value_virtual_fn_field): Fix formatting.
	(switch_to_cp_abi, register_cp_abi): Update.  register_cp_abi now
	takes a pointer.
	(set_cp_abi_as_auto_default, set_cp_abi_cmd, show_cp_abi_cmd)
	(list_cp_abis, _initialize_cp_abi): New functions.
	* cp-abi.h: Add prototype for set_cp_abi_as_auto_default.  Remove
	declarations for cp_abis, num_cp_abis, current_cp_abi, and
	switch_to_cp_abi.  Update prototype for register_cp_abi.
	* Makefile.in (cp-abi.o): Update dependencies.
	* minsyms.c (install_minimal_symbols): Call set_cp_abi_as_auto_default
	instead of switch_to_cp_abi.
	* gnu-v2-abi.c (_initialize_gnu_v2_abi): Likewise.  Update call to
	register_cp_abi.
	* gnu-v3-abi.c (_initialize_gnu_v3_abi): Update call to
	register_cp_abi.
	* hpacc-abi.c (_initialize_hpacc_abi): Likewise.