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6a2cc040 - libtextstyle: Use gnulib module 'term-style-control'.

libtextstyle: Use gnulib module 'term-style-control'. * gnulib-local/lib/term-ostream.oo.h: Include term-style-control.h. (ttyctl_t): Remove type. * gnulib-local/lib/term-ostream.oo.c (DEBUG_SIGNALS): Remove macro. Don't include <signal.h>, <stdio.h>, <sys/stat.h>, fatal-signal.h, sig-handler.h, same-inode.h. (SIZEOF): Remove macro. (nonintr_tcgetattr, nonintr_tcsetattr): Remove functions. (log_message, sprintf_integer, simple_errno_string, simple_signal_string, log_signal_handler_called): Remove functions. (struct term_ostream): Remove fields tty_control, same_as_stderr, non_default_active. Add control_data field instead. (get_control_data): New function. (BLOCK_SIGNALS_DURING_NON_DEFAULT_STYLE_OUTPUT): Remove macro. (term_fd): Remove variable. (pgrp_status_t): Remove type. (pgrp_status): Remove variable. (update_pgrp_status): Remove function. (out_filename): Remove variable. (out_error): Use out_stream instead of out_filename. (restore, tcsetattr_failed): Remove functions. (orig_lflag_set, orig_lflag): Remove variables. (clobber_local_mode, restore_local_mode): Remove functions. (job_control_signals): Remove variable. (num_job_control_signals): Remove macro. (relevant_signal_set, relevant_signal_set_initialized): Remove variables. (init_relevant_signal_set, block_relevant_signals, unblock_relevant_signals, is_ignored, show_signal_marker, fatal_or_stopping_signal_handler, fatal_signal_handler, stopping_signal_handler, continuing_signal_handler, ensure_continuing_signal_handler, ensure_other_signal_handlers): Remove functions. (out_attr_change): Set out_stream and out_fd. (activate_non_default_attr, deactivate_non_default_attr): Remove functions. (restore, async_restore, async_set_attributes_from_default): New functions. (controller): New variable. (activate_default_attr, output_buffer): Update. (term_ostream::free): Invoke deactivate_term_style_controller. (term_ostream_create): Invoke activate_term_style_controller. * gnulib-local/m4/term-ostream.m4 (gl_TERM_OSTREAM): Don't test for tcgetattr(). * gnulib-local/modules/term-ostream (Depends-on): Add term-style-control. Remove fatal-signal, sigaction, sigprocmask, same-inode.