v1.20: Critical 8.3/8.4 Bug Fix

Bug Fixes:

* Fixed an issue that prevented tablespaces from being backed up on PostgreSQL ≤ 8.4.
* Fixed missing flag in C library build that resulted in a mismatched binary on 32-bit systems. (Reported by Adrian Vondendriesch.)

Features:

* Add s3-repo-ca-path and s3-repo-ca-file options to accommodate systems where CAs are not automatically found by IO::Socket::SSL, i.e. RHEL7, or to load custom CAs. (Suggested by Scott Frazer.)

Refactoring:

* Harden protocol handshake to handle race conditions.
* Fixed misleading error message when a file was opened for write in a missing directory.
* Change log level of hardlink logging to detail.
* Cast size in S3 manifest to integer.
* Rename Archive modules to remove redundancy.
* Improve S3 error reporting.
* Minor optimizations to package loads and ordering for archive-get and archive-push commands.

README.md

@@ -6,7 +6,7 @@ pgBackRest aims to be a simple, reliable backup and restore system that can seam
 
 Instead of relying on traditional backup tools like tar and rsync, pgBackRest implements all backup features internally and uses a custom protocol for communicating with remote systems. Removing reliance on tar and rsync allows for better solutions to database-specific backup challenges. The custom remote protocol allows for more flexibility and limits the types of connections that are required to perform a backup which increases security.
 
-pgBackRest [v1.19](https://github.com/pgbackrest/pgbackrest/releases/tag/release/1.19) is the current stable release. Release notes are on the [Releases](http://www.pgbackrest.org/release.html) page.
+pgBackRest [v1.20](https://github.com/pgbackrest/pgbackrest/releases/tag/release/1.20) is the current stable release. Release notes are on the [Releases](http://www.pgbackrest.org/release.html) page.
 
 ## Features