TLDR: *huge* existing presence of 'iseek' and 'oseek'; most OSes document
them as pure synonyms for 'skip' and 'seek'.
The implementation where I encountered it was SCO OpenServer. Like
Solaris, there was a distinction between 'iseek' and 'skip' ('skip' reads,
'iseek' seeks); no
Hello --
I constantly confuse 'seek=N' and 'skip=N'. The two words have no natural
affinity to one I/O direction or the other.
I previously encountered a `dd` implementation which also accepted
'oseek=N' and 'iseek=N', which I found far more natural and easy to
remember.
Here is a small patch
