Add -fipa-pta to build options

Fixed pkgconfig libarchive path for MacOSX build.

add missing StateRestore on mapper 354

Updated access token.

Updated readmes for 2.6.4

Added 2.6.3 web press release.

Prepare 2022-02-18 release based on upstream 2.6.2

Prepare 2022-02-18 release based on upstream 2.6.2

Updated docs and web pages for upcoming 2.6.2 release.

Updated readme files for 2.6.1 release.