Add a transaction service API to check for rollback errors at commit whose success state is unknown.
Not implemented for Persistit.
This inner class can be static.
merge MMcM: Add a transaction service API to check for rollback errors at commit whose success state is unknown

Merge pull request #1211 from MMcM/sql-layer/retry-commit-unknown
https://github.com/FoundationDB/sql-layer/pull/1211
merge MMcM: Another backreference due to inner class

Merge pull request #1212 from MMcM/sql-layer/more-query-context-references
https://github.com/FoundationDB/sql-layer/pull/1212
Failing test
Remove unique/null specialization, now stored as regular indexes.

Fixes #539
Fixes #603
Fixes #675
Bump data version
Do a little less in IndexRowBuffer
Test for concurrent unique index
merge nathanlws: Simplify UNIQUE index representation

Merge pull request #1214 from nathanlws/sql-layer/simplify-unique-indexes
https://github.com/FoundationDB/sql-layer/pull/1214
Include standard_conforming_strings in the initial status dialog or else psql is confused.
Handle it via the special condition, rather than as a config option, since it isn't changeable.
merge MMcM: Include standard_conforming_strings in the initial status dialog

Merge pull request #1215 from MMcM/sql-layer/pg-initial-standard-conforming-strings
https://github.com/FoundationDB/sql-layer/pull/1215
Fix bug in the fdb-sql-layer.init script for the DEB packaging, where it
calls init-functions/status_of_proc with wrong parameters and fails.
merge tjoneslo: Fix bug in the fdb-sql-layer.init script for the DEB packaging,

Merge pull request #1216 from tjoneslo/sql-layer/init.d-script-fix
https://github.com/FoundationDB/sql-layer/pull/1216