[rfa] rename insight to insight

[Elena Zannoni]

Keith Seitz writes:
 > On Tue, 27 Aug 2002, Grace Sainsbury wrote:
 > 
 > > is it ok to commit?
 > 
 > You may certainly check-in anything that I can approve (anything in 
 > gdb/gdbtk and insight build/configury/testsuite).
 > 
 > Keith

Ok for top.c/main.c

Elena