Sidebar on include.h (was getting rid of mkproto.sh from Samba3

[tridge at samba.org]

David,

 >    A customer of mine now occasionally uses -MMD, .d files and a
 > script to prune out extra #include files when they're using gcc,
 > and lint|grep "unneeded" when they're using a vendor compiler.

or use script/minimal_includes.pl, which does it very neatly, and
doesn't depend on gcc. It also knows about marking an #include file as
definately being needed, so you don't remove it just because it's not
needed on the platform you happen to be on.

Cheers, Tridge