opensc-explorer: simplify arg parsing in do_change() & do_unblock()
opensc-explorer: simplify arg parsing in do_change() & do_unblock()

Simplify argument handling in do_change() and do_unblock(),
making the functions shorter and deasier to understand.,

Signed-off-by: Peter Marschall <4b8373d016f277527198385ba72fda0feb5da015@adpm.de>

financeX/OpenSC,marschap/pkg-opensc,velter/OpenSC,dirkx/OpenSC,aobaid/OpenSC,viktorTarasov/OpenSC-SM,ieugen/OpenSC,mouse07410/OpenSC,gentoo/OpenSC,fabled/OpenSC,jpki/OpenSC,0x7678/myOpenSC,mouse07410/OpenSC,gentoo/OpenSC,aobaid/OpenSC,jpki/OpenSC,ieugen/OpenSC,dirkx/OpenSC.tokend,AktivCo/OpenSC,adminmt/OpenSC,martinpaljak/OpenSC,marschap/pkg-opensc,financeX/OpenSC,0x7678/myOpenSC,gemini/OpenSC,adminmt/OpenSC,frankmorgner/OpenSC,marschap/pkg-opensc,tidatida/OpenSC,gentoo/OpenSC,financeX/OpenSC,philipWendland/OpenSC,carlhoerberg/OpenSC,hongquan/OpenSC-main,dirkx/OpenSC.tokend,kasparsd/opensc-latvia-id,dirkx/OpenSC,fabled/OpenSC,ieugen/OpenSC,martinpaljak/OpenSC,mtrojnar/OpenSC,hongquan/OpenSC-main,kasparsd/opensc-latvia-id,carlhoerberg/OpenSC,CardContact/OpenSC,0x7678/OpenSC,viktorTarasov/OpenSC-SM,hhonkanen/OpenSC,UIKit0/OpenSC,kasparsd/opensc-latvia-id,gemini/OpenSC,mouse07410/OpenSC,dengert/OpenSC,dirkx/OpenSC.tokend,carlhoerberg/OpenSC,dirkx/OpenSC,Jakuje/OpenSC,ieugen/OpenSC,l1k/OpenSC,dengert/OpenSC,metsma/OpenSC,metsma/OpenSC,velter/OpenSC,aobaid/OpenSC,carlhoerberg/OpenSC,kasparsd/opensc-latvia-id,0x7678/OpenSC,fabled/OpenSC,martinpaljak/OpenSC,mtrojnar/OpenSC,Jakuje/OpenSC,viktorTarasov/OpenSC-SM,velter/OpenSC,AktivCo/OpenSC,philipWendland/OpenSC,aobaid/OpenSC,gentoo/OpenSC,0x7678/OpenSC,rickyepoderi/OpenSC,UIKit0/OpenSC,hhonkanen/OpenSC,frankmorgner/OpenSC,dirkx/OpenSC.tokend,jpki/OpenSC,carlhoerberg/OpenSC,tidatida/OpenSC,dirkx/OpenSC,dirkx/OpenSC.tokend,germanblanco/OpenSC,l1k/OpenSC,adminmt/OpenSC,philipWendland/OpenSC,frankmorgner/OpenSC,dengert/OpenSC,nmav/OpenSC,l1k/OpenSC,metsma/OpenSC,ieugen/OpenSC,rickyepoderi/OpenSC,financeX/OpenSC,dirkx/OpenSC.tokend,nmav/OpenSC,gemini/OpenSC,nmav/OpenSC,OpenSC/OpenSC,mtrojnar/OpenSC,germanblanco/OpenSC,rickyepoderi/OpenSC,marschap/pkg-opensc,OpenSC/OpenSC,financeX/OpenSC,adminmt/OpenSC,gentoo/OpenSC,LudovicRousseau/OpenSC,CardContact/OpenSC,CardContact/OpenSC,OpenSC/OpenSC,0x7678/myOpenSC,UIKit0/OpenSC,0x7678/myOpenSC,LudovicRousseau/OpenSC,hhonkanen/OpenSC,frankmorgner/OpenSC,Jakuje/OpenSC,hongquan/OpenSC-main,0x7678/myOpenSC,UIKit0/OpenSC,germanblanco/OpenSC,dirkx/OpenSC,LudovicRousseau/OpenSC,velter/OpenSC,fabled/OpenSC,tidatida/OpenSC,AktivCo/OpenSC,0x7678/OpenSC,tidatida/OpenSC,Jakuje/OpenSC