Documented reader's max_recv_size/max_send_size
Documented reader's max_recv_size/max_send_size

Closes https://github.com/OpenSC/OpenSC/issues/802

nmav/OpenSC,philipWendland/OpenSC,Jakuje/OpenSC,mtrojnar/OpenSC,Jakuje/OpenSC,CardContact/OpenSC,hhonkanen/OpenSC,philipWendland/OpenSC,mouse07410/OpenSC,LudovicRousseau/OpenSC,CardContact/OpenSC,fabled/OpenSC,martinpaljak/OpenSC,LudovicRousseau/OpenSC,rickyepoderi/OpenSC,metsma/OpenSC,rickyepoderi/OpenSC,mouse07410/OpenSC,frankmorgner/OpenSC,martinpaljak/OpenSC,dengert/OpenSC,fabled/OpenSC,jpki/OpenSC,mtrojnar/OpenSC,martinpaljak/OpenSC,jpki/OpenSC,frankmorgner/OpenSC,OpenSC/OpenSC,jpki/OpenSC,frankmorgner/OpenSC,viktorTarasov/OpenSC-SM,philipWendland/OpenSC,frankmorgner/OpenSC,hongquan/OpenSC-main,LudovicRousseau/OpenSC,nmav/OpenSC,OpenSC/OpenSC,hongquan/OpenSC-main,dengert/OpenSC,Jakuje/OpenSC,OpenSC/OpenSC,hhonkanen/OpenSC,CardContact/OpenSC,AktivCo/OpenSC,metsma/OpenSC,rickyepoderi/OpenSC,mtrojnar/OpenSC,fabled/OpenSC,viktorTarasov/OpenSC-SM,fabled/OpenSC,dengert/OpenSC,AktivCo/OpenSC,mouse07410/OpenSC,hhonkanen/OpenSC,viktorTarasov/OpenSC-SM,AktivCo/OpenSC,metsma/OpenSC,hongquan/OpenSC-main,nmav/OpenSC,Jakuje/OpenSC