FSAL_ZFS: misc FSAL_ZFS fixes
9P: mount.9P is not using resolveip anymore.
CMAKE: remove useless "install" statement.
       This will be back as FSAL_FUSE will be repaired.
MAIN: add support for capabilities (needed for quota and CRED_WRAP in VFS)
FSAL_VFS/CREDS: add CRED_WRAP logic to FSAL_VFS
                /!\ Be careful: do not merge this commit
                    If you do not want CRED_WRAP in VFS
CPack: ignore .git files (those in src/libntirpc for example)
CPack: ignore .gitignore files from tarball
CPack: remove rpm generation from CPACK config (it's done by UseRPMTools)
RPM: new cmake+cpack based RPM generation.