opt.urls moving target

[Georg-Johann Lay]

So I added a new option -moptimize to avr.opt and added a respective
entry

moptimize
UrlSuffix(gcc/AVR-Options.html#index-moptimize)

to avr.opt.urls.  Then I got a complaint from buildbot diff,
indicating that the correct entry should be

moptimize
UrlSuffix(gcc/AVR-Options.html#index-moptimize-1)

which I applied, just to get the next diff complaint that
the correct entry should be

moptimize
UrlSuffix(gcc/AVR-Options.html#index-moptimize)

What the heck?

So I gave up trying to hit that moving target.

Johann