update documentation

- clarify all template options & link to previews
- document new ctype extension requirement

cfg/conf.sample.php

@@ -37,9 +37,12 @@ defaultformatter = "plaintext"
 ; size limit per paste or comment in bytes, defaults to 10 Mebibytes
 sizelimit = 10485760
 
-; template to include, default is "bootstrap" (tpl/bootstrap.php)
-; Also available is a dark version ("bootstrap-dark",) and
-; a theme that resembles the classic ZeroBin style ("page".)
+; template to include, default is "bootstrap" (tpl/bootstrap.php), also
+; available are "page" (tpl/page.php), the classic ZeroBin style and several
+; bootstrap variants: "bootstrap-dark", "bootstrap-compact", "bootstrap-page",
+; which can be combined with "-dark" and "-compact" for "bootstrap-dark-page"
+; and finally "bootstrap-compact-page" - previews at:
+; https://privatebin.info/screenshots.html
 template = "bootstrap"
 
 ; (optional) info text to display
@@ -242,7 +245,7 @@ dir = PATH "data"
 ; - AWS_ACCESS_KEY_ID
 ; - AWS_SECRET_ACCESS_KEY
 ; - AWS_SESSION_TOKEN (if needed)
-; for more details, see https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html#default-credential-chain 
+; for more details, see https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html#default-credential-chain
 ;class = S3Storage
 ;[model_options]
 ;region = "eu-central-1"
@@ -264,4 +267,4 @@ dir = PATH "data"
 ; (optional) the "signature" (access key) issued by YOURLS for the using account
 ; signature = ""
 ; (optional) the URL of the YOURLS API, called to shorten a PrivateBin URL
-; apiurl = "https://yourls.example.com/yourls-api.php"
+; apiurl = "https://yourls.example.com/yourls-api.php"