fixes bug 999773 - KeyError on self.context.laglog.max_bytes_critical
fixes bug 956759 - Exploitability report should include bug information for signatures
bug 1005326 - fix sql syntax for correlations
Merge pull request #2040 from rhelmer/bug1005326-correlations-filter-null

bug 1005326 - fix sql syntax for correlations
(no bug) fix alembic revision order
Merge pull request #2043 from rhelmer/nobug-fix-alembic-order

(no bug) fix alembic revision order
Merge pull request #2041 from peterbe/bug-999773-keyerror-on-selfcontextlaglogmax_bytes_critical-in-laglog-implementation

fixes bug 999773 - KeyError on self.context.laglog.max_bytes_critical
Merge pull request #2042 from peterbe/bug-956759-exploitability-report-should-include-bug-information-for-signatures

fixes bug 956759 - Exploitability report should include bug information for signatures