rspamd is using the wrong settings for add_header / rewrite_subject
When using rspamd and setting an account to a policy that is either using add header or rewrite subject, the second option is not added to the config file.
```
ispc_spamfilter_user_78 {
priority = 10;
rcpt = "x@y.com";
apply {
CLAM_VIRUS = 1004.5;
JUST_EICAR = 1004.5;
actions {
"rewrite subject" = 4;
reject = 4.5;
greylist = null;
}
}
}
```
This seems to lead to a problem that the default value for `add_header` is used and as it is mostly higher than the `reject` value leads to unwanted behaviour:
Score: 8.9 leads to `add_header` instead of `reject` because default for rspamd is 6.0
issue