docs: fix harmful FAQ password reset and removed PHP/MySQL features

Refs #213

Signed-off-by: Thomas Vincent <thomasvincent@gmail.com>

Author: somethingwithproof

Frequently-Asked-Questions.md

@@ -68,18 +68,17 @@ installation documents included that may also help.
 
 **Q:** I have forgotten my 'admin' password to Cacti, how do I reset it?
 
-**A:** To reset the admin account password back to the default of 'admin',
-connect to your Cacti database at the command line.
+**A:** Use the built-in CLI password reset tool. Run the following from your
+Cacti root directory as the web server user (e.g. `www-data` on Debian/Ubuntu,
+`apache` on RHEL/Rocky):
 
-```sql
-shell> mysql -u root -p cacti
+```console
+php cli/change_password.php --user=admin --password=admin
 ```
 
-Now execute the following SQL:
-
-```sql
-MySQL> update user_auth set password=md5('admin') where username='admin';
-```
+> **Warning:** Do not use direct SQL `md5()` updates. Cacti 1.x stores
+> passwords with bcrypt/phpass. Setting an MD5 hash via SQL will lock the
+> account — the login will fail even with the correct password.
 
 ## Monitoring
 
@@ -244,9 +243,8 @@ change between the new small counter value and the large previous value. One way
 to combat this issue is to specify realistic maximum values for your data
 sources. RRDtool will ignore any value that is larger than the maximum value.
 
-If you already have a spike on one or more of your graphs, there is a really
-[useful Perl script](http://cricket.sourceforge.net/contrib/files/killspike2)
-that will remove them for you.
+If you already have a spike on one or more of your graphs, Cacti includes a
+built-in Spikekill utility. See [Spikekill](Spikekill.md) for usage.
 
 ---
 

Installing-Under-Windows.md

@@ -47,17 +47,13 @@ Cacti yourself, please follow the instructions below.
    sort_buffer_size = 200M     # Adjust for your OS memory size
 
    # important for compatibility
-   sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER
+   sql_mode=NO_ENGINE_SUBSTITUTION
 
    innodb_flush_log_at_trx_commit = 2
    innodb_flush_log_at_timeout = 3
    innodb_file_per_table = ON
 
    innodb_buffer_pool_size = 4500M # Adjust for your OS memory size
-   
-   # for very large indexes
-   innodb_file_format = Barracuda
-   innodb_large_prefix = 1
 
    # for SSD's on a 64 core server
    innodb_doublewrite = OFF
@@ -105,7 +101,8 @@ The following changes will be required regardless of your selected Webserver.
 
    ```ini
    extension_dir = c:\php\ext
-   extension=php_mysql.dll
+   extension=php_mysqli.dll
+   extension=php_pdo_mysql.dll
    extension=php_snmp.dll
    extension=php_sockets.dll
    cgi.force_redirect = 0
@@ -147,24 +144,21 @@ The following changes will be required regardless of your selected Webserver.
 
 ## IIS Specific Steps
 
-1. Start the Internet Information Services (IIS) Manager, right click on the
-   Default Web Site (in most cases) and select Properties.
+> **Note:** PHP 8 does not provide an ISAPI module (`php8isapi.dll` does not
+> exist). Use PHP with IIS via **FastCGI** instead, which is the recommended
+> and supported method for PHP 7+ on IIS.
 
-2. Under the Home Directory tab, select Configuration and click Add. Browse to
-   the path of `php8isapi.dll`, and type in .php as the
-   extension. Note: if using IIS6, Enable All Verbs and Script Engine.
+1. In IIS Manager, install the **CGI** role service if not already present.
 
-3. Under the ISAPI Filters tab, click Add and browse to the `php8isapi.dll`
-   file. Name the filter "php" and click OK.
+2. Add a FastCGI application: open **FastCGI Settings**, click **Add
+   Application**, and set the full path to `c:\php\php-cgi.exe`.
 
-5. Under the Documents tab, add `index.php` to the list.
+3. Add a Handler Mapping for `.php` extension pointing to `php-cgi.exe` using
+   the FastCGI module.
 
-6. If using IIS6, goto Web Service Extensions and add a new Web Service
-   Extension. Name the extension "php", and click Add and browse to the
-   `php8isapi.dll` file, enable Set Extension status to
-   Enable, and click OK.
+4. Under the Documents tab, add `index.php` to the list.
 
-7. Give the IIS user read & execute permissions to the required files
+5. Give the IIS user read & execute permissions to the required files
    file `%windir%\system32\cmd.exe`. They will also need read permissions on
    `cacti_web_root/cacti` and it's subfolders.
    A anm example provided by one user included the following assuming the
@@ -183,7 +177,7 @@ The following changes will be required regardless of your selected Webserver.
    icacls "C:\inetpub\wwwroot\cacti\include\vendor\csrf\csrf-secret.php" /grant "IUSR:(RX,W)"
    ```
 
-8. Completely stop and start the IIS service using the following commands:
+6. Completely stop and start the IIS service using the following commands:
 
    ```batchfile
    net stop iisadmin