NickServ module : Make NickServ nickname configurable.
NickServ module : Make NickServ nickname configurable.

On some networks, NickServ is named differently and this makes NickServ module unable to auto-ident.
This patch enables configuration of NickServ nickname to make it works on such IRC networks.

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