CIs: attempt to use csources_v1 (#16282)

* CIs: attempt to use csources_v1
* also updated the BSDs
* also updated azure pipelines
* std modules should not itself use the 'std/' import dir...
* compiler has to be careful with std/ for v1 booting

(cherry picked from commit a9b62de895)

compiler/jsgen.nim

@@ -35,7 +35,7 @@ import
   cgmeth, lowerings, sighashes, modulegraphs, lineinfos, rodutils,
   transf, injectdestructors, sourcemap
 
-import std/[json, sets, math, tables, intsets, strutils]
+import json, sets, math, tables, intsets, strutils
 
 from modulegraphs import ModuleGraph, PPassContext
 

compiler/nim.nim

@@ -24,7 +24,7 @@ import
   idents, lineinfos, cmdlinehelper,
   pathutils, modulegraphs
 
-from std/browsers import openDefaultBrowser
+from browsers import openDefaultBrowser
 from nodejs import findNodeJs
 
 when hasTinyCBackend:

compiler/nimpaths.nim

@@ -16,7 +16,7 @@ interpolation variables:
 Unstable API
 ]##
 
-import std/[os,strutils]
+import os, strutils
 
 const
   docCss* = "$nimr/doc/nimdoc.css"

compiler/vmgen.nim

@@ -16,7 +16,7 @@
 #   types that use the 'node' field; the reason is that slots are
 #   re-used in a register based VM. Example:
 #
-#..code-block:: nim
+#.. code-block:: nim
 #   let s = a & b  # no matter what, create fresh node
 #   s = a & b  # no matter what, keep the node
 #