Use badger version with an ARM fix

I hope this will fix the following critical error that I have seen
whenever writing a lot of data to Badger on my Raspberry Pi:

  Unable to truncate file: "[…]/000001.vlog" error: mremap size mismatch: requested: 271382146 got: 536870912

This error causes data loss (yikes.) It seems to have been fixed in
Ristretto already [1] so I'm going to try that.

[1] dgraph-io/ristretto#281

rendezvous_hashing/go.mod

@@ -2,6 +2,8 @@ module github.com/46bit/distributed_systems/rendezvous_hashing
 
 go 1.15
 
+replace github.com/dgraph-io/badger/v3 v3.2103.1 => github.com/46bit/badger/v3 v3.2103.1-with-arm-fix
+
 require (
 	github.com/dgraph-io/badger/v3 v3.2103.1
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0

rendezvous_hashing/go.sum

@@ -1,5 +1,7 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/46bit/badger/v3 v3.2103.1-with-arm-fix h1:etTvubjS6my+Z0iKuf53ANayxw3zgBV4XCP7fcG/zhY=
+github.com/46bit/badger/v3 v3.2103.1-with-arm-fix/go.mod h1:Zc1QYD5BZItQV+JBHWoxgx58irdq0fC5z4ZZ2O3RH3Y=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
@@ -30,8 +32,6 @@ github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwc
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgraph-io/badger/v3 v3.2103.1 h1:zaX53IRg7ycxVlkd5pYdCeFp1FynD6qBGQoQql3R3Hk=
-github.com/dgraph-io/badger/v3 v3.2103.1/go.mod h1:dULbq6ehJ5K0cGW/1TQ9iSfUk0gbSiToDWmWmTsJ53E=
 github.com/dgraph-io/ristretto v0.1.0 h1:Jv3CGQHp9OjuMBSne1485aDpUkTKEcUqF+jm/LuerPI=
 github.com/dgraph-io/ristretto v0.1.0/go.mod h1:fux0lOrBhrVCJd3lcTHsIJhq1T2rokOu6v9Vcb3Q9ug=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=