v2.09: Minor Improvements and Bug Fixes

Bug Fixes:

* Fix issue with multiple async status files causing a hard error. (Reported by Vidhya Gurumoorthi, Joe Ayers, Douglas J Hunley.)

Improvements:

* The info command is implemented entirely in C.
* Simplify info command text message when no stanzas are present by replacing the repository path with "the repository".
* Add _DARWIN_C_SOURCE flag to Makefile for MacOS builds. (Contributed by Douglas J Hunley.)
* Update address lookup in C TLS client to use modern methods. (Suggested by Bruno Friedmann.)
* Include Posix-compliant header for strcasecmp() and fd_set. (Suggested by ucando.)

README.md

@@ -4,7 +4,7 @@
 
 pgBackRest aims to be a simple, reliable backup and restore solution that can seamlessly scale up to the largest databases and workloads by utilizing algorithms that are optimized for database-specific requirements.
 
-pgBackRest [v2.08](https://github.com/pgbackrest/pgbackrest/releases/tag/release/2.08) is the current stable release. Release notes are on the [Releases](http://www.pgbackrest.org/release.html) page.
+pgBackRest [v2.09](https://github.com/pgbackrest/pgbackrest/releases/tag/release/2.09) is the current stable release. Release notes are on the [Releases](http://www.pgbackrest.org/release.html) page.
 
 Documentation for v1 can be found [here](http://www.pgbackrest.org/1). No further releases are planned for v1 because v2 is backward-compatible with v1 options and repositories.