[c-nsp] High CPU on 3750 stacks, fix, sort of

[Jeff Kell]

The issues with high CPU utilization when making configuration changes
(hulc running con process replicating changes to other stack members) is
reported fixed in 12.2(58)SE1.

But there is a small problem...

The image is available for 3560, 3560X, 3750, 3750E, 3750X.   But *NOT*
the 3750G-12S.

The image won't fit, as the 3750G-12S only has 16Mb flash.  The "new"
(sucky, Web 2.0, Ajax-riddled, stinking) software download page won't
list it for a 3750G-12S.  And even the image-only .bin won't fit on the
3750G-12S if you tried.  Can't read the release notes either (currently
returning a "forbidden" page) to see if there is any official word on this.

So they ditch the 3550-12 (stuck at 12.2(44) officially, despite
continuing updates for the DC model), never offer a 3560-12, finally
release a 3750-12, and it lasted for what, 3 releases?

Jeff