- Make ex really work that is vim is required for build otherwise
libpp API does not work correct

- Make sigexec using a contolling terminal

- Avoid compiler optimizers which may cause asynchrony behaviour

- Update to 2012-01-01 of ksh93u+ which includes some of our patches
12-01-01 A timing problem with >; has been fixed.
12-01-01 A macro expansion memory leak has been fixed.
11-12-26 A bug in array assignments of the form arr=( $arr[i] ...) in which
arr was not unset before the assignment has been fixed.
11-12-20 A number of code changes were made based on the results of errors
indicated by static code analysis.
11-12-13 In vi edit mode a lteral can now be entered by preceding it
with a backshash.
11-12-13 When tab is entered for completion after a ' or ", the ' and "
characters are no longer deleted.
11-12-07 A bug in which a program in the current direcotry with a . in the
name could fail to execute when both PATH and FPATH end with :. has
been fixed.
11-12-07 I fixed a bug in which a variable expansion in a large here-document
could be expanded to a null string.
11-12-06 An optimization to read was added in the case the the read command
was redirected from a file.
11-12-06 Changes were made to make the line limit for read unlimited by
default.
11-12-05 A bug in which unsetting an array variable did not completely clear
the variable in some cases has been fixed.
11-12-02 +The printf alternative character # when applied to the %q format will