build: Bump version to 0.19.1rc2

Tree-SHA512: 7ba1efdc24835405562b5ff710ed4223d7e4463dffa58721cc9e0f0f0ba90925e59719cb68b31f95cfc632a73ca9a5573e762167eed264c66323828a397b9127

Author: laanwj

configure.ac

@@ -4,7 +4,7 @@ define(_CLIENT_VERSION_MAJOR, 0)
 define(_CLIENT_VERSION_MINOR, 19)
 define(_CLIENT_VERSION_REVISION, 1)
 define(_CLIENT_VERSION_BUILD, 0)
-define(_CLIENT_VERSION_RC, 1)
+define(_CLIENT_VERSION_RC, 2)
 define(_CLIENT_VERSION_IS_RELEASE, true)
 define(_COPYRIGHT_YEAR, 2019)
 define(_COPYRIGHT_HOLDERS,[The %s developers])