Add configuration option ShowImages

When enabled, clients accessing gemini pages via HTTPS will see links to
images as inline images.

Resolves #13.

CONFIGURATION.md

@@ -23,6 +23,11 @@ Address to listen for connections on in the format of `interface:port`.
 Content types may be defined by file extension. When a type is not defined for
 the requested file extension, content type is detected automatically.
 
+## ShowImages
+
+When enabled, clients accessing gemini pages via HTTPS will see links to images
+as inline images.
+
 ## Hosts
 
 Hosts are defined by their hostname followed by one or more paths to serve.

config.go

@@ -11,6 +11,7 @@ import (
 	"strconv"
 	"strings"
 
+	"code.rocketnine.space/tslocum/gmitohtml/pkg/gmitohtml"
 	"github.com/kballard/go-shellquote"
 	"github.com/yookoala/gofast"
 	"gopkg.in/yaml.v2"
@@ -76,6 +77,7 @@ type hostConfig struct {
 type serverConfig struct {
 	Listen       string
 	Types        map[string]string
+	ShowImages   bool
 	Hosts        map[string]*hostConfig
 	DisableHTTPS bool
 	DisableSize  bool
@@ -151,6 +153,8 @@ func readconfig(configPath string) error {
 		config.Types[".gemini"] = geminiType
 	}
 
+	gmitohtml.Config.ConvertImages = config.ShowImages
+
 	defaultHost := config.Hosts["default"]
 	delete(config.Hosts, "default")