visudo enhancement to edit-syntax-check arbitrary files

[Todd C. Miller]

In message <15386.26851.715335.618702 at hprwp.fc.hp.com>
	so spake Bob Proulx (rwp):

> The configure script is generated by autoconf and it is true of all
> autoconf generated configured scripts that the default is -g which
> follows GNU Project guidelines.  However you can easily provide any
> particular combination of compiler flags that you prefer.

Right.  The default for gcc is "-O2 -g" and "-g" for other compilers
since configure has no way of knowing how safe the various optimization
flags are on any particular compiler.  Furthermore, some compilers
use +On for optimization.

 - todd