When calling the API to delete a user:
```
curl -X DELETE "https://discourse.example.com/admin/users/159.json" \
-H "Content-Type: multipart/form-data;" \
-H "Api-Key: ***" \
-H "Api-Username: ***" \
-F "delete_posts=true" \
-F "block_email=false" \
-F "block_urls=false" \
-F "block_ip=false"
```
Setting the parameters `block_email`, `block_urls` and `block_ip`explicitly to `false` did not work because the values weren't being parsed to boolean.
b546e09dd9