add documentation for --exclude[-file] and patterns
add documentation for --exclude[-file] and patterns

jayme-github/restic,fawick/restic,ar-jan/restic,restic/restic,stuertz/restic,fawick/restic,ckemper67/restic,jayme-github/restic,arithmetric/restic,middelink/restic,middelink/restic,kurin/restic,mappu/restic,restic/restic,ar-jan/restic,stuertz/restic,byo/restic,byo/restic,kurin/restic