Allow log module to get no arguments.
Allow log module to get no arguments.

This was broken since znc-0.098-17-g64e565c (563bce5987ca4c24035279126243ea0f5c7b9efa)
which introduced possibility of log module to specify wanted path as argument.

Thanks to turnor for reporting this.

TingPing/znc,trisk/znc,BtbN/znc,reedloden/znc,Adam-/znc,anthonyryan1/znc,Hasimir/znc,kashike/znc,markusj/znc,Adam-/znc,jantman/znc,jpnurmi/znc,badloop/znc,anthonyryan1/znc,TuffLuck/znc,YourBNC/znc,anthonyryan1/znc,aarondunlap/znc,Adam-/znc,jantman/znc,withinsoft/znc,dgw/znc,Mkaysi/znc,kashike/znc,jpnurmi/znc,Hasimir/znc,jreese/znc,Mikaela/znc,DarthGandalf/znc,dgw/znc,jpnurmi/znc,znc/znc,Hasimir/znc,anthonyryan1/znc,dgw/znc,KielBNC/znc,Zarthus/znc,badloop/znc,reedloden/znc,trisk/znc,KiNgMaR/znc,evilnet/znc,Phansa/znc,jpnurmi/znc,TuffLuck/znc,Hasimir/znc,GLolol/znc,elyscape/znc,DarthGandalf/znc,Zarthus/znc,reedloden/znc,Zarthus/znc,elyscape/znc,jpnurmi/znc,Phansa/znc,BtbN/znc,dgw/znc,KielBNC/znc,Mkaysi/znc,markusj/znc,KielBNC/znc,YourBNC/znc,elyscape/znc,psychon/znc,jreese/znc,jreese/znc,evilnet/znc,jreese/znc,YourBNC/znc,Kriechi/znc,evilnet/znc,DarthGandalf/znc,psychon/znc,Hasimir/znc,badloop/znc,aarondunlap/znc,TingPing/znc,KiNgMaR/znc,markusj/znc,aarondunlap/znc,Mkaysi/znc,aarondunlap/znc,wolfy1339/znc,withinsoft/znc,ollie27/znc,dgw/znc,Mkaysi/znc,Zarthus/znc,jantman/znc,ollie27/znc,Mkaysi/znc,Kriechi/znc,kashike/znc,Adam-/znc,anthonyryan1/znc,Phansa/znc,markusj/znc,TuffLuck/znc,trisk/znc,YourBNC/znc,BtbN/znc,ollie27/znc,BtbN/znc,Phansa/znc,KiNgMaR/znc,Phansa/znc,TingPing/znc,Zarthus/znc,anthonyryan1/znc,kashike/znc,jantman/znc,withinsoft/znc,trisk/znc,znc/znc,jpnurmi/znc,Adam-/znc,Mikaela/znc,Mikaela/znc,TingPing/znc,GLolol/znc,Mikaela/znc,Adam-/znc,wolfy1339/znc,KiNgMaR/znc,BtbN/znc,wolfy1339/znc,evilnet/znc,GLolol/znc,BtbN/znc,aarondunlap/znc,TingPing/znc,TuffLuck/znc,znc/znc,DarthGandalf/znc,DarthGandalf/znc,KielBNC/znc,elyscape/znc,trisk/znc,evilnet/znc,Zarthus/znc,YourBNC/znc,Kriechi/znc,withinsoft/znc,DarthGandalf/znc,ollie27/znc,markusj/znc,trisk/znc,Kriechi/nobnc,aarondunlap/znc,Adam-/znc,znc/znc,Mikaela/znc,wolfy1339/znc,reedloden/znc,znc/znc,badloop/znc,badloop/znc,kashike/znc,Kriechi/znc,KiNgMaR/znc,ollie27/znc,Kriechi/znc,psychon/znc,reedloden/znc,KielBNC/znc,psychon/znc,TuffLuck/znc,jreese/znc,Mikaela/znc,Hasimir/znc,wolfy1339/znc,jreese/znc,elyscape/znc,jpnurmi/znc,withinsoft/znc,elyscape/znc,Kriechi/nobnc,aarondunlap/znc,GLolol/znc,Kriechi/znc,jantman/znc,KielBNC/znc,Mikaela/znc,TuffLuck/znc,Phansa/znc,Kriechi/nobnc,dgw/znc,reedloden/znc,GLolol/znc,Mkaysi/znc,GLolol/znc,wolfy1339/znc,badloop/znc,jantman/znc,withinsoft/znc,anthonyryan1/znc,evilnet/znc,markusj/znc,kashike/znc,psychon/znc,Mkaysi/znc,TuffLuck/znc,psychon/znc,ollie27/znc,Hasimir/znc,KiNgMaR/znc,YourBNC/znc,badloop/znc,znc/znc,TingPing/znc