* main_loop.c (exec_command): Return ERR if 'system' can't
create a shell process.
* main_loop.c (main_loop): Flush stdout/stderr before reading a
new command.
* buffer.c (put_sbuf_line): Added size parameter.
* ed.1: Man page is now generated with 'help2man'.
* ed.1: All command-line options are now documented in the man page.
* Restored copyright notices of Andrew L. Moore. It seems Andrew
granted some permissions but never assigned copyright to the FSF.
* buffer.c (append_lines): Fixed 'a', 'c' and 'i' commands.
(When used in a global command list, the commands following
them in the list were ignored).
* main_loop.c (exec_command): Fixed 'e' command.
(It quitted when invoked a second time with a modified buffer).
* main.c: Added new option '--restricted'.
* 'red' has been converted to a script invoking 'ed --restricted'.
* Description of ed in the manual has been changed.
* testsuite: Modified some tests and removed obsolete posix tests.
* main_loop.c: 'ibufp' variable made local to main_loop.
* Defined type bool to make clear which functions and variables
are Boolean.
* Added 'const' to all pointer declarations accepting it.
* regex.c (replace_matching_text): Make se_max an enum.
* signal.c: Include termios.h
* Converted C99 style comments '//' to C89 style comments '/* */'.
* ed.texinfo: Fixed an erratum.
* Changed copyright holder from Andrew, Antonio to the FSF.
* buffer.c, main_loop.c: Undo now restores the modified status.
* regex.c (search_and_replace): Fixed a race condition with user
interrupt.
* signal.c: Added functions resize_line_buffer and
resize_undo_buffer to definitively fix the aliasing warnings.
* Some minor corrections have been made to the manual.
* carg_parser.c (ap_resize_buffer): An aliasing related segfault
that only occurs when overoptimizing with GCC on some
architectures (alpha, sparc) has been (hopefully) fixed.
* signal.c (resize_buffer): Likewise.
* configure: Locale has been fixed to 'C'.
* Makefile.in: Man page is now installed by default.
* 'make install-info' should now work on Debian and OS X.
* ed.texinfo: License updated to GFDL version 1.3 or later.
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