Unescape URLs before creating SAS log in HttpConnection, for consistency with HttpStack
Clarify rules for URL-escaping
Add relevant statistcs to SAS log on overload
Update resource bundle ID
Merge remote-tracking branch 'origin/master' into sas_overload
Merge pull request #165 from Metaswitch/sas_overload

[Reviewer: Ellie] Add relevant statistics to SAS log on overload
Merge pull request #163 from Metaswitch/sas_unescaped_urls

[Reviewer: Ellie] Unescape URLs before creating SAS log in HttpConnection, for consistency...
Exclude thread cleanup function from coverage
Merge pull request #167 from Metaswitch/log_coverage

[No review required] Exclude thread cleanup function from coverage