docs: update v2.23.1-ReleaseNotes

Signed-off-by: Karel Zak <kzak@redhat.com>
Add build scripts
Clean build
Check for pcre if we have selinux and if found
add to link the variable set with libs is not
used in someplaces where it should be ...

Fixes build problems on distrotech build
Rebuild autotools
Replace -lseliux with SELINUX_LIBS/link with pthread
Dont barf on unset macros
Bump to 2.24
Autogen