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

doc/Installation.md

@@ -22,6 +22,7 @@ for more information.
 ### Minimal Requirements
 
 - PHP version 7.3 or above
+- ctype extension
 - GD extension (when using identicon or vizhash icons, jdenticon works without it)
 - zlib extension
 - some disk space or a database supported by [PDO](https://php.net/manual/book.pdo.php)