increase duplicity's volume size from the default of 25MB to 100MB so we create fewer files
increase duplicity's volume size from the default of 25MB to 100MB so we create fewer files

choltha/mailinabox,pichak/mailinabox,pichak/mailinabox,brocktice/mailinabox,mboersma/mailinabox,PortableTech/mailinabox,jmedding/mailinabox,choltha/mailinabox,choltha/mailinabox,m4rcs/mailinabox,brocktice/mailinabox,b-deng/mailinabox,jprice/mailinabox,pierreozoux/mailinabox,PortableTech/mailinabox,jmedding/mailinabox,jmedding/mailinabox,jjz/mailinabox,b-deng/mailinabox,d5ve/mailinabox,PortableTech/mailinabox,jjz/mailinabox,nstanke/mailinabox,pierreozoux/mailinabox,jjz/mailinabox,jprice/mailinabox,mail-in-a-box/mailinabox,PortableTech/mailinabox,Toilal/mailinabox,d5ve/mailinabox,mail-in-a-box/mailinabox,hnk/mailinabox,m4rcs/mailinabox,m4rcs/mailinabox,nstanke/mailinabox,jjz/mailinabox,ianberinger/mailinabox,pichak/mailinabox,d5ve/mailinabox,brocktice/mailinabox,Toilal/mailinabox,brocktice/mailinabox,pierreozoux/mailinabox,nstanke/mailinabox,b-deng/mailinabox,nstanke/mailinabox,b-deng/mailinabox,d5ve/mailinabox,hnk/mailinabox,Toilal/mailinabox,pierreozoux/mailinabox,jprice/mailinabox,mboersma/mailinabox,Neopallium/mailinabox,mail-in-a-box/mailinabox,ianberinger/mailinabox,jmedding/mailinabox,hnk/mailinabox,Neopallium/mailinabox,brocktice/mailinabox,choltha/mailinabox,Neopallium/mailinabox,jprice/mailinabox,ianberinger/mailinabox,m4rcs/mailinabox,Neopallium/mailinabox,mboersma/mailinabox,jjz/mailinabox,choltha/mailinabox,m4rcs/mailinabox,Neopallium/mailinabox,pierreozoux/mailinabox,jmedding/mailinabox,pichak/mailinabox,nstanke/mailinabox,d5ve/mailinabox,Toilal/mailinabox,hnk/mailinabox,mail-in-a-box/mailinabox,mboersma/mailinabox,b-deng/mailinabox,PortableTech/mailinabox,jprice/mailinabox,ianberinger/mailinabox,ianberinger/mailinabox,mboersma/mailinabox