Truncate over-long strings of 9s.

We use long strings of 9s as bounding values for integers.  On 32-bit
values, if those long strings exceed 999999999 the resulting int wraps
and is smaller, so don't use more than nine 9s in a row.

(cherry picked from commit 58684edfd95a1eb8080eef3266c27e30f1180d1e)

Conflicts:
	lib/3.7/packages.cf