Merge docs about "requireChangeId" into "config-project-config.txt"

Change-Id: I829c274750c7c5378845de5aabee88eafe46b591
diff --git a/Documentation/config-project-config.txt b/Documentation/config-project-config.txt
index 7c73b14..8962632 100644
--- a/Documentation/config-project-config.txt
+++ b/Documentation/config-project-config.txt
@@ -159,11 +159,27 @@
 
 [[receive.requireChangeId]]receive.requireChangeId::
 +
-Controls whether or not the Change-Id must be included in the commit message
-in the last paragraph. Default is `INHERIT`, which means that this property
-is inherited from the parent project. The global default for new hosts
-is `true`
-+
+The `Require Change-Id in commit message` option defines whether a
+link:user-changeid.html[Change-Id] in the commit message is required
+for pushing a commit for review. If this option is set, trying to push
+a commit for review that doesn't contain a Change-Id in the commit
+message fails with link:error-missing-changeid.html[missing Change-Id
+in commit message footer].
+
+It is recommended to set this option and use a
+link:user-changeid.html#create[commit-msg hook] (or other client side
+tooling like EGit) to automatically generate Change-Id's for new
+commits. This way the Change-Id is automatically in place when changes
+are reworked or rebased and uploading new patch sets gets easy.
+
+If this option is not set, commits can be uploaded without a Change-Id,
+but then users have to remember to copy the assigned Change-Id from the
+change screen and insert it manually into the commit message when they
+want to upload a second patch set.
+
+Default is `INHERIT`, which means that this property is inherited from
+the parent project. The global default for new hosts is `true`
+
 This option is deprecated and future releases will behave as if this
 is always `true`.
 
diff --git a/Documentation/project-configuration.txt b/Documentation/project-configuration.txt
index 29a0840..308c134 100644
--- a/Documentation/project-configuration.txt
+++ b/Documentation/project-configuration.txt
@@ -67,23 +67,8 @@
 [[require-change-id]]
 === Require Change-Id
 
-The `Require Change-Id in commit message` option defines whether a
-link:user-changeid.html[Change-Id] in the commit message is required
-for pushing a commit for review. If this option is set, trying to push
-a commit for review that doesn't contain a Change-Id in the commit
-message fails with link:error-missing-changeid.html[missing Change-Id
-in commit message footer].
-
-It is recommended to set this option and use a
-link:user-changeid.html#create[commit-msg hook] (or other client side
-tooling like EGit) to automatically generate Change-Id's for new
-commits. This way the Change-Id is automatically in place when changes
-are reworked or rebased and uploading new patch sets gets easy.
-
-If this option is not set, commits can be uploaded without a Change-Id,
-but then users have to remember to copy the assigned Change-Id from the
-change screen and insert it manually into the commit message when they
-want to upload a second patch set.
+See details at
+link:config-project-config.html#receive.requireChangeId[require change id].
 
 === Maximum Git Object Size Limit