Log Message:
Update ipa to 2.0.6, per maintainer update request by PR 41686.

Changes:
    *	autoconf 2.61 -> 2.62, automake 1.10 -> 1.10.1.

    *	When time goes back or changes too quickly, then ipa incorrectly
	used too much CPU time and generated a lot of log messages.

    *	Now several databases can be written in "db_list" parameter's
	value in ipa.conf.

    *	Now lint can check source code of IPA.