proc-cmdline: introduce PROC_CMDLINE_RD_STRICT
    
    Our current set of flags allows an option to be either
    use just in initrd or both in initrd and normal system.
    This new flag is intended to be used in the case where
    you want apply some settings just in initrd or just
    in normal system.
    
    (cherry picked from commit ed58820d7669971762dd887dc117d922c23f2543)
    
    Related: #1643429
    
    patch_name: 0038-proc-cmdline-introduce-PROC_CMDLINE_RD_STRICT.patch
    present_in_specfile: true
    location_in_specfile: 38
    squash_commits: true