Rename the settings whose names do not say what they control (closes #234)

Applies the setting renames of the naming audit under the SWW_WAF_ and
SWW_RPROXY_ prefixes, with sneak's names for the IP reputation cache
time and the two time limits, which now take milliseconds. The rproxy
log field default_disposition becomes waf_backend_no_answer, and
config.Config and config.FromEnvironment become config.WAF and
config.WAFFromEnvironment. Go fields, test names and prose follow. No
aliases; nothing reads the old names.

Model: opus-5-5

internal/coreruleset/nextcloud_test.go

@@ -13,7 +13,7 @@ import (
 	"sneak.berlin/go/smallwebwaf/internal/coreruleset"
 )
 
-// nextcloudThreshold is SWW_WAF_CORE_RULE_SET_ANOMALY_THRESHOLD's default.
+// nextcloudThreshold is SWW_WAF_CORE_RULE_SET_SCORE_THRESHOLD's default.
 const nextcloudThreshold = 5
 
 // nextcloudSignIn is the sign-in page.
@@ -102,7 +102,8 @@ func TestNextcloudPasswordInValuePassesOnlyOnHostnamesThatServeNextcloud(
 	t.Parallel()
 
 	crs := shared(t, coreruleset.Params{
-		ParanoiaLevel: 1, DisabledRules: defaultDisabledRules, BodyLimit: bodyLimit,
+		ParanoiaLevel: 1, DisabledRules: defaultDisabledRules,
+		BodyInspectionSize: bodyInspectionSize,
 		Apps: map[string][]string{
 			giteaHost: {gitea},
 			otherHost: {nextcloud},
@@ -528,7 +529,7 @@ func TestNextcloudPasswordFieldsPass(t *testing.T) {
 func TestNextcloudUserPasswordInValuePasses(t *testing.T) {
 	t.Parallel()
 
-	const threshold = 5 // SWW_WAF_CORE_RULE_SET_ANOMALY_THRESHOLD's default
+	const threshold = 5 // SWW_WAF_CORE_RULE_SET_SCORE_THRESHOLD's default
 
 	crs := readingBodies(t)
 	target := nextcloudUsers + "/alice"