[daip] Minor aips suggestions

[Eric Greisen]

 > I'm running aips on a rather new linux distribution.  I get the following 
 > warning that will likely become more common as more people are running 
 > with newer "head" and "tail" unix tools:
 > 
 > head: `-1' option is obsolete; use `-n 1' since this will be removed in 
 > the future
 > 
 > The simple fix is to follow the above advice, and the same for the "tail" 
 > command.  Both these unix tools are used several times in the various 
 > installation and startup scripts.  The fix shouldn't affect recent 
 > versions of head/tail, at least back to the versions that shipped with 
 > redhat 7.0 .

Thanks, done.

Eric Greisen