[DS-1085] Apply patch (slightly updated) from Jira ticket
reverting 8e6217a, not necessary to increment the lang pack version
[DS-286] Remove unmaintained Bash script.

The AIP export/import tools may also be useful replacements for this.
Resurrected build.xml's help menu item 'clean_backups'
Merge pull request #187 from MinDogger/DS-1123

Resurrected build.xml's help menu item 'clean_backups'
add 'test_database' target to ant command help
Merge pull request #165 from helix84/DS-1085

[DS-1085] EPerson last_active field is defined but never filled

Tested, appears to work.  No negative reviews after several weeks.
authentication-ldap.cfg comment about slash in URL
DS-1503 use getAttribute first before attempting to check getHeader for
the user value. ShibUseHeaders is not enabled by default in Apache.