docs: moved sapi input filtering

Author: NickSdot

docs/source/extensions/bundled-extensions.md

@@ -1,5 +1,12 @@
 # PHP build system V5 overview
 
+```{toctree}
+---
+hidden: true
+---
+bundled-extensions/filter
+```
+
 - supports Makefile.ins during transition phase
 - not-really-portable Makefile includes have been eliminated
 - supports separate build directories without VPATH by using explicit rules only

docs-old/input-filter.md …/extensions/bundled-extensions/filter.mddocs-old/input-filter.md renamed to docs/source/extensions/bundled-extensions/filter.md docs-old/input-filter.md renamed to docs/source/extensions/bundled-extensions/filter.md

@@ -1,4 +1,4 @@
-# Input filter support in PHP
+# ext/filter
 
 XSS (Cross Site Scripting) hacks are becoming more and more prevalent, and can
 be quite difficult to prevent. Whenever you accept user data and somehow display