Fix getbalance *
Fix getbalance *

Chance "getbalance *" not to use IsTrusted.  The method and result
now match the "getbalance <specific-account>" behavior. In
particular, "getbalance * 0" now works.

Also fixed a comment -- GetGalance has required 1 confirmation
for many years, and the default "getbalance *" behavior matches
that.

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