3.81
Fix Savannah bug # 1328: if stdout is redirected to a full filesystem, we check for this and exit with an error. The closeout.c version from gnulib pulls in too much other stuff, and gnulib requires an ANSI C 89 compliant compiler, while GNU make (so far) still wants to work on K&R.
* Added the test suite to the main distribution.
Fix Savannah bug # 1332: handle backslash-newline pairs in command scripts according to POSIX rules.
Extend .SECONDEXPANSION to implicit rules. Final fix for bug #13781.