[css-values] Update DoC

Author: fantasai

css-values/issues-cr-2015.bsi

@@ -126,7 +126,7 @@ From:     Florian Rivoal
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Mar/0078.html
 Response:
 Closed:   Accepted
-Resolved:
+Resolved: Bugfix
 ----
 Issue 16.
 Summary:  Fallback value for ch in text-orientation:upright
@@ -151,7 +151,7 @@ From:     David Baron
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Feb/0184.html
 Response: https://lists.w3.org/Archives/Public/www-style/2016Mar/0178.html
 Closed:   Accepted
-Resolved:
+Resolved: Bugfix
 ----
 Issue 19.
 Summary:  pushState() breaks relative URL resolution
@@ -174,3 +174,17 @@ Comment:  https://lists.w3.org/Archives/Public/www-style/2016Mar/0247.html
 Response: https://lists.w3.org/Archives/Public/www-style/2016Jun/0031.html
 Closed:   Invalid
 ----
+Issue 22.
+Summary:  Define canonical values for serialization
+From:     Tab Atkins and fantasai
+Comment:  https://github.com/w3c/csswg-drafts/issues/178
+Open:     Accepted
+Resolved: =WG= Review and discuss <resolution>.
+----
+Issue 23.
+Summary:  Link to more information on serialization
+From:     Sime Vidas
+Comment:  https://github.com/w3c/csswg-drafts/issues/179
+Closed:   Accepted
+Resolved: Editorial
+----