#685 Add php implementation for PBKDF2

- Create php sample for PBKDF2
- Rename pbkdf2 java classes (remove Crypt prefix)
- Remove options from hash setting comment that should not be used

src/main/java/fr/xephi/authme/settings/properties/SecuritySettings.java

@@ -64,9 +64,10 @@ public class SecuritySettings implements SettingsHolder {
         newProperty("settings.security.unLoggedinGroup", "unLoggedinGroup");
 
     @Comment({
-        "Possible values: MD5, SHA1, SHA256, WHIRLPOOL, XAUTH, MD5VB, PHPBB,",
-        "MYBB, IPB3, PHPFUSION, SMF, XENFORO, SALTED2MD5, JOOMLA, BCRYPT, WBB3, SHA512,",
-        "DOUBLEMD5, PBKDF2, PBKDF2DJANGO, WORDPRESS, ROYALAUTH, CUSTOM (for developers only)"
+        "Possible values: SHA256, BCRYPT, BCRYPT2Y, PBKDF2, SALTEDSHA512, WHIRLPOOL,",
+        "MYBB, IPB3, PHPBB, PHPFUSION, SMF, XENFORO, XAUTH, JOOMLA, WBB3, WBB4, MD5VB,",
+        "PBKDF2DJANGO, WORDPRESS, ROYALAUTH, CUSTOM (for developers only). See full list at",
+        "https://github.com/AuthMe/AuthMeReloaded/blob/master/docs/hash_algorithms.md"
     })
     public static final Property<HashAlgorithm> PASSWORD_HASH =
         newProperty(HashAlgorithm.class, "settings.security.passwordHash", HashAlgorithm.SHA256);