Fix postgres-username sed command to work with both GNU & BSD sed
Fix postgres-username sed command to work with both GNU & BSD sed

Mac OS X uses BSD sed, which is pickier about its -i option and its
definition of basic vs "modern" regular expressions.

cp/calagator-1,L2-D2/calagator,bencornelis/calagator,reidab/calagator,bencornelis/calagator,cp/calagator-1,jmcduffie32/calagator,shawnacscott/calagator,L2-D2/calagator,L2-D2/calagator,oktober/calagator,iamBalaji/Calagator,kerrizor/calagator,matthewkmayer/calagator,oktober/calagator,iamBalaji/Calagator,oktober/calagator,cp/calagator-1,kerrizor/calagator,shawnacscott/calagator,jmcduffie32/calagator,jmcduffie32/calagator,reidab/calagator,kerrizor/calagator,L2-D2/calagator,shawnacscott/calagator,matthewkmayer/calagator,bencornelis/calagator,jmcduffie32/calagator,kerrizor/calagator,matthewkmayer/calagator,cp/calagator-1,iamBalaji/Calagator,bencornelis/calagator,matthewkmayer/calagator,reidab/calagator,oktober/calagator,iamBalaji/Calagator,shawnacscott/calagator,reidab/calagator