DOC: Apply brand-preferred case (#429)

* Apply brand-preferred case

* Apply case to own branding as well

providers/activedir/activedirProvider.go

@@ -62,6 +62,6 @@ func newDNS(config map[string]string, metadata json.RawMessage) (providers.DNSSe
 		p.adServer = srv
 		return p, nil
 	}
-	fmt.Printf("WARNING: PowerShell not available. ActiveDirectory will not be updated.\n")
+	fmt.Printf("WARNING: PowerShell not available. Active Directory will not be updated.\n")
 	return providers.None{}, nil
 }

providers/activedir/doc.md

@@ -1,6 +1,6 @@
-### ActiveDirectory
+### Active Directory
 
-This provider updates a DNS Zone in an ActiveDirectory Integrated Zone.
+This provider updates a DNS Zone in an Active Directory Integrated Zone.
 
 When run on Windows, AD is updated directly. The code generates
 PowerShell commands, executes them, and checks the results.

providers/digitalocean/digitaloceanProvider.go

@@ -18,7 +18,7 @@ import (
 
 /*
 
-Digitalocean API DNS provider:
+DigitalOcean API DNS provider:
 
 Info required in `creds.json`:
    - token
@@ -39,7 +39,7 @@ var defaultNameServerNames = []string{
 // NewDo creates a DO-specific DNS provider.
 func NewDo(m map[string]string, metadata json.RawMessage) (providers.DNSServiceProvider, error) {
 	if m["token"] == "" {
-		return nil, errors.Errorf("no Digitalocean token provided")
+		return nil, errors.Errorf("no DigitalOcean token provided")
 	}
 
 	ctx := context.Background()