bump base, deepseq, wai, warp upper bounds, for compatibility with
the latest versions and GHC 7.10
use SO_REUSEADDR when starting test server
This makes the test suite more reliable when run repeatedly
Add a few new constraints to test runner
Test network-2.6 now that httpd-shed supports it
Drop support for GHC 6.10 and 6.12
Merge branch 'luite-master'

Conflicts:
	HTTP.cabal
update test script for version bumps
Remove unnecessary case for wai<1.4.1 - minimum supported is 2.1
Bump version to 4000.2.19
Don't try to test deepseq 1.4 yet
Bump build tools to support GHC 7.10