4 files changed, 18 insertions, 10 deletions
diff --git a/modules/caddyhttp/matchers.go b/modules/caddyhttp/matchers.go
index a22a3f1..073f82f 100644
--- a/modules/caddyhttp/matchers.go
+++ b/modules/caddyhttp/matchers.go
@@ -97,7 +97,8 @@ type (
 	// ```
 	MatchQuery url.Values
 
-	// MatchHeader matches requests by header fields. It performs fast,
+	// MatchHeader matches requests by header fields. The key is the field
+	// name and the array is the list of field values. It performs fast,
 	// exact string comparisons of the field values. Fast prefix, suffix,
 	// and substring matches can also be done by suffixing, prefixing, or
 	// surrounding the value with the wildcard `*` character, respectively.
@@ -114,7 +115,8 @@ type (
 	// (potentially leading to collisions).
 	MatchHeaderRE map[string]*MatchRegexp
 
-	// MatchProtocol matches requests by protocol.
+	// MatchProtocol matches requests by protocol. Recognized values are
+	// "http", "https", and "grpc".
 	MatchProtocol string
 
 	// MatchRemoteIP matches requests by client IP (or CIDR range).
@@ -139,9 +141,9 @@ type (
 	// matchers within a set work the same (i.e. different matchers in
 	// the same set are AND'ed).
 	//
-	// Note that the generated docs which describe the structure of
-	// this module are wrong because of how this type unmarshals JSON
-	// in a custom way. The correct structure is:
+	// NOTE: The generated docs which describe the structure of this
+	// module are wrong because of how this type unmarshals JSON in a
+	// custom way. The correct structure is:
 	//
 	// ```json
 	// [
diff --git a/modules/caddyhttp/responsematchers.go b/modules/caddyhttp/responsematchers.go
index d9ad848..821def9 100644
--- a/modules/caddyhttp/responsematchers.go
+++ b/modules/caddyhttp/responsematchers.go
@@ -32,7 +32,7 @@ type ResponseMatcher struct {
 
 	// If set, each header specified must be one of the
 	// specified values, with the same logic used by the
-	// request header matcher.
+	// [request header matcher](/docs/json/apps/http/servers/routes/match/header/).
 	Headers http.Header `json:"headers,omitempty"`
 }
 
diff --git a/modules/caddyhttp/templates/templates.go b/modules/caddyhttp/templates/templates.go
index 8f2ea2c..80efded 100644
--- a/modules/caddyhttp/templates/templates.go
+++ b/modules/caddyhttp/templates/templates.go
@@ -237,7 +237,8 @@ type Templates struct {
 	// Default is text/plain, text/markdown, and text/html.
 	MIMETypes []string `json:"mime_types,omitempty"`
 
-	// The template action delimiters.
+	// The template action delimiters. If set, must be precisely two elements:
+	// the opening and closing delimiters. Default: `["{{", "}}"]`
 	Delimiters []string `json:"delimiters,omitempty"`
 }
 
diff --git a/modules/caddyhttp/vars.go b/modules/caddyhttp/vars.go
index 479ef0a..5779b5d 100644
--- a/modules/caddyhttp/vars.go
+++ b/modules/caddyhttp/vars.go
@@ -29,9 +29,14 @@ func init() {
 	caddy.RegisterModule(MatchVarsRE{})
 }
 
-// VarsMiddleware is an HTTP middleware which sets variables
-// in the context, mainly for use by placeholders. The
-// placeholders have the form: `{http.vars.variable_name}`
+// VarsMiddleware is an HTTP middleware which sets variables to
+// have values that can be used in the HTTP request handler
+// chain. The primary way to access variables is with placeholders,
+// which have the form: `{http.vars.variable_name}`, or with
+// the `vars` and `vars_regexp` request matchers.
+//
+// The key is the variable name, and the value is the value of the
+// variable. Both the name and value may use or contain placeholders.
 type VarsMiddleware map[string]string
 
 // CaddyModule returns the Caddy module information.