Avoid reading first / last slice for archive format when using an isolated catalog
modifying class sar to allow openning in read-only mode from any slice
Merge branch 'branch_2.8.x'
updating configure.ac with non-obsolete directives
Merge branch 'branch_2.7.x' into branch_2.8.x
fixing bug: dar inappropriately tries but fails restoring FSA in dry-run mode
dar_static and dar_manager_static distribution
implemented since releases 2.8.3 and 2.7.20