Rename re_read_readline_init_file to readline_re_read_init_file. * libinterp/interpfcn/input.cc(Fre_read_readline_init_file): Rename function. * NEWS: Announce renaming. * doc/interpreter/basics.txi: Rename function in manual. * libgui/src/resource-manager.cc: Rename function in list of functions. * scripts/deprecated/re_read_readline_init_file.m: Deprecated m-file to call readline_re_read_init_file. * scripts/deprecated/module.mk: Add re_read_readline_init_file.m to build system

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