[metadata] update blogs

data/blogs/metadata.yaml

@@ -31,3 +31,5 @@ vector_of_bool:
   description: The creations of a mad(dening) template specialization
   avatar_url: https://vector-of-bool.github.io/favicon.png
   source_url: https://vector-of-bool.github.io/
+vitaut:
+  source_url: https://vitaut.net

data/blogs/posts/oldnewthing.yaml

@@ -1,5 +1,35 @@
 # Maintained by meta-updater blogs. Manual edits are preserved.
 # Set hidden: true and retain only post_id to suppress an item.
+- post_id: mO2FLrYyy57jWTEK
+  source_id: oldnewthing
+  source_title: The Old New Thing
+  title: std::call_once vs. std::async
+  url: https://devblogs.microsoft.com/oldnewthing/20260917-00/?p=112706
+  published: 2026-09-17 14:00:00+00:00
+  description: Simple vs complex machinery. The post <CODE>std::call_once</CODE> vs. <CODE>std::async</CODE> appeared first on The Old New Thing .
+  tags:
+  - Code
+  - Old New Thing
+- post_id: gt1SdIoec9_G92C1
+  source_id: oldnewthing
+  source_title: The Old New Thing
+  title: Magic statics vs. std::call_once
+  url: https://devblogs.microsoft.com/oldnewthing/20260916-00/?p=112703
+  published: 2026-09-16 14:00:00+00:00
+  description: They sort of do the same thing, but differently. The post Magic statics vs. <CODE>std::call_once</CODE> appeared first on The Old New Thing .
+  tags:
+  - Code
+  - Old New Thing
+- post_id: y5KyZ65yT2_wcd89
+  source_id: oldnewthing
+  source_title: The Old New Thing
+  title: Why do Microsoft job levels start in the high 50’s instead of starting at a sane number like 1?
+  url: https://devblogs.microsoft.com/oldnewthing/20260915-00/?p=112700
+  published: 2026-09-15 14:00:00+00:00
+  description: It used to start at 1, but that was the old system. The post Why do Microsoft job levels start in the high 50’s instead of starting at a sane number like 1? appeared first on The Old New Thing .
+  tags:
+  - Old New Thing
+  - Other
 - post_id: PtkwWlztbc4Z7c_t
   source_id: oldnewthing
   source_title: The Old New Thing

data/blogs/posts/sandor_dargo.yaml

@@ -1,5 +1,15 @@
 # Maintained by meta-updater blogs. Manual edits are preserved.
 # Set hidden: true and retain only post_id to suppress an item.
+- post_id: G8gFTaGp5B-mYQrr
+  source_id: sandor_dargo
+  source_title: Sandor Dargo's Blog
+  title: 'C++26: Trivial infinite loops are no longer undefined behaviour'
+  url: https://www.sandordargo.com/blog/2026/09/16/cpp26-trivial-infinite-loops
+  published: 2026-09-15 22:00:00+00:00
+  updated: 2026-09-15 22:00:00+00:00
+  description: Let’s start with a question! Is this program well-defined? int main() { while (true) ; } If you said yes, you’d be wrong — at least before C++26. A while (true); loop with no side effects used to be undefined behaviour. Compilers were free to assume it terminates, and some — Cla…
+  tags:
+  - dev
 - post_id: cC1Cu11__fUcO4cD
   source_id: sandor_dargo
   source_title: Sandor Dargo's Blog