Better message when `DOWNLOAD_TARGET = NOP`
Better message when `DOWNLOAD_TARGET = NOP`

See https://github.com/SynoCommunity/spksrc/commit/89b235855839174913256a0d0fb5c459b625dd0a#diff-de37b3c0178feefc04a02efe9c69d2deL5.
xtech9/spksrc,Grimthorr/spksrc,lysin/spksrc,hadess/spksrc,schumi2004/spksrc,adrien-delhorme/spksrc,GaetanCambier/spksrc,cdcabrera/spksrc,Foncekar/spksrc,Pyrex-FWI/spksrc,saschpe/spksrc,phoenix741/spksrc,jdierkse/spksrc,markbastiaans/spksrc,mjoe/spksrc,GaetanCambier/spksrc,hmflash/spksrc,sangood/spksrc,schumi2004/spksrc,andyblac/spksrc,Foncekar/spksrc,schumi2004/spksrc,lysin/spksrc,nickbroon/spksrc,phoenix741/spksrc,Decipher/spksrc,riverful/spksrc,hmflash/spksrc,sangood/spksrc,phoenix741/spksrc,saschpe/spksrc,GaetanCambier/spksrc,Grimthorr/spksrc,mirweb/spksrc,Pyrex-FWI/spksrc,Pyrex-FWI/spksrc,cdcabrera/spksrc,mirweb/spksrc,hadess/spksrc,JasOXIII/spksrc,xtech9/spksrc,Dr-Bean/spksrc,xtech9/spksrc,lost-carrier/spksrc,Grimthorr/spksrc,adrien-delhorme/spksrc,hmflash/spksrc,lost-carrier/spksrc,cdcabrera/spksrc,sea3pea0/spksrc,nickbroon/spksrc,JasOXIII/spksrc,schumi2004/spksrc,phoenix741/spksrc,mreppen/spksrc,lysin/spksrc,riverful/spksrc,hmflash/spksrc,astroganga/spksrc,jdierkse/spksrc,Grimthorr/spksrc,Foncekar/spksrc,Pyrex-FWI/spksrc,sea3pea0/spksrc,Grimthorr/spksrc,GoodOmens83/spksrc,GaetanCambier/spksrc,demorfi/spksrc,bwynants/spksrc,mreppen/spksrc,Pyrex-FWI/spksrc,xtech9/spksrc,phoenix741/spksrc,nickbroon/spksrc,thunfischbrot/spksrc,thunfischbrot/spksrc,andyblac/spksrc,saschpe/spksrc,saschpe/spksrc,hmflash/spksrc,nickbroon/spksrc,mreppen/spksrc,hmflash/spksrc,lost-carrier/spksrc,andyblac/spksrc,mreppen/spksrc,jdierkse/spksrc,schumi2004/spksrc,lysin/spksrc,astroganga/spksrc,andyblac/spksrc,bwynants/spksrc,cdcabrera/spksrc,GaetanCambier/spksrc,hadess/spksrc,nickbroon/spksrc,jdierkse/spksrc,nickbroon/spksrc,sangood/spksrc,astroganga/spksrc,hadess/spksrc,bwynants/spksrc,mirweb/spksrc,mjoe/spksrc,Decipher/spksrc,thunfischbrot/spksrc,schumi2004/spksrc,Foncekar/spksrc,Decipher/spksrc,lysin/spksrc,mirweb/spksrc,Dr-Bean/spksrc,riverful/spksrc,GoodOmens83/spksrc,Dr-Bean/spksrc,Grimthorr/spksrc,sea3pea0/spksrc,mjoe/spksrc,lost-carrier/spksrc,schumi2004/spksrc,Decipher/spksrc,cdcabrera/spksrc,mjoe/spksrc,bwynants/spksrc,riverful/spksrc,GoodOmens83/spksrc,markbastiaans/spksrc,mjoe/spksrc,andyblac/spksrc,demorfi/spksrc,markbastiaans/spksrc,Pyrex-FWI/spksrc,Decipher/spksrc,markbastiaans/spksrc,hmflash/spksrc,sangood/spksrc,schumi2004/spksrc,mreppen/spksrc,GaetanCambier/spksrc,Foncekar/spksrc,thunfischbrot/spksrc,xtech9/spksrc,saschpe/spksrc,Grimthorr/spksrc,markbastiaans/spksrc,GaetanCambier/spksrc,GaetanCambier/spksrc,sea3pea0/spksrc,adrien-delhorme/spksrc,JasOXIII/spksrc,hadess/spksrc,lost-carrier/spksrc,andyblac/spksrc,xtech9/spksrc,saschpe/spksrc,mreppen/spksrc,Dr-Bean/spksrc,mjoe/spksrc,Decipher/spksrc,Foncekar/spksrc,JasOXIII/spksrc,phoenix741/spksrc,astroganga/spksrc,phoenix741/spksrc,adrien-delhorme/spksrc,astroganga/spksrc,sangood/spksrc,mirweb/spksrc,demorfi/spksrc,riverful/spksrc,jdierkse/spksrc,bwynants/spksrc,sangood/spksrc,JasOXIII/spksrc,mjoe/spksrc,sangood/spksrc,lost-carrier/spksrc,xtech9/spksrc,bwynants/spksrc,thunfischbrot/spksrc,andyblac/spksrc,riverful/spksrc,riverful/spksrc,lost-carrier/spksrc,markbastiaans/spksrc,cdcabrera/spksrc,JasOXIII/spksrc,andyblac/spksrc,jdierkse/spksrc,lysin/spksrc,GoodOmens83/spksrc,hadess/spksrc,astroganga/spksrc,bwynants/spksrc,sangood/spksrc,lysin/spksrc,sea3pea0/spksrc,cdcabrera/spksrc,demorfi/spksrc,schumi2004/spksrc,JasOXIII/spksrc,thunfischbrot/spksrc,riverful/spksrc,Dr-Bean/spksrc,nickbroon/spksrc,mirweb/spksrc,lost-carrier/spksrc,Foncekar/spksrc,Decipher/spksrc,demorfi/spksrc,GaetanCambier/spksrc,Dr-Bean/spksrc,hmflash/spksrc,astroganga/spksrc,saschpe/spksrc,Foncekar/spksrc,mirweb/spksrc,Decipher/spksrc,astroganga/spksrc,sea3pea0/spksrc,cdcabrera/spksrc,lysin/spksrc,thunfischbrot/spksrc,thunfischbrot/spksrc,Foncekar/spksrc,nickbroon/spksrc,adrien-delhorme/spksrc,Grimthorr/spksrc,adrien-delhorme/spksrc,mjoe/spksrc,demorfi/spksrc,lysin/spksrc,GoodOmens83/spksrc,mreppen/spksrc,jdierkse/spksrc,Pyrex-FWI/spksrc,markbastiaans/spksrc,markbastiaans/spksrc,mirweb/spksrc,bwynants/spksrc,adrien-delhorme/spksrc,bwynants/spksrc,thunfischbrot/spksrc,andyblac/spksrc,Grimthorr/spksrc,sangood/spksrc,nickbroon/spksrc,demorfi/spksrc,hadess/spksrc,mirweb/spksrc,mreppen/spksrc,phoenix741/spksrc,astroganga/spksrc,Decipher/spksrc,GoodOmens83/spksrc,hadess/spksrc,GoodOmens83/spksrc,demorfi/spksrc,JasOXIII/spksrc,jdierkse/spksrc,riverful/spksrc,sea3pea0/spksrc,Pyrex-FWI/spksrc,mjoe/spksrc,mirweb/spksrc,sea3pea0/spksrc,cdcabrera/spksrc,JasOXIII/spksrc,sea3pea0/spksrc,xtech9/spksrc,lost-carrier/spksrc,adrien-delhorme/spksrc,hmflash/spksrc,saschpe/spksrc,GoodOmens83/spksrc,Dr-Bean/spksrc,GoodOmens83/spksrc,mreppen/spksrc,Dr-Bean/spksrc,hadess/spksrc,adrien-delhorme/spksrc,Pyrex-FWI/spksrc,demorfi/spksrc,xtech9/spksrc,jdierkse/spksrc,saschpe/spksrc,phoenix741/spksrc,markbastiaans/spksrc