* NEWS: Mention symbol-reloading has been deleted.

	* NEWS: Mention symbol-reloading has been deleted.
	* symfile.c (symbol_reloading): Delete.
	(show_symbol_reloading): Delete.
	(_initialize_symfile): Delete set/show symbol-reloading.

	doc/
	* gdb.texinfo (Help): Change apropos example to use "alias" instead
	of "reload".
	(Symbols): Delete docs for set/show symbol-reloading.
	* gdbint.texinfo (Defining Other Architecture Features): Delete
	SYMBOL_RELOADING_DEFAULT.
	* refcard.tex: Delete reference to symbol-reloading.

	testsuite/
	* gdb.base/default.exp: Delete tests for symbol-reloading.
	* gdb.base/help.exp: Ditto.
	* gdb.base/setshow.exp: Ditto.
	* gdb.base/gdb_history: Delete references to symbol-reloading.