Added release notes for release-7.4

Signed-off-by: Rinku Kothiya <rkothiya@redhat.com>

docs/release-notes/7.4.md

@@ -0,0 +1,31 @@
+# Release notes for Gluster 7.4
+
+This is a bugfix release. The release notes for [7.0](7.0.md)
+contains a listing of all the new features that were added
+and bugs fixed in the GlusterFS 7 stable release.
+
+**NOTE:** Next minor release tentative date: Week of 20th Apr, 2020
+
+## Major changes, features and limitations addressed in this release
+
+**None**
+
+
+## Major issues
+
+**None**
+
+## Bugs addressed
+
+Bugs addressed since release-7.3 are listed below.
+
+- [#1785323](https://bugzilla.redhat.com/1785323): glusterfsd cashes after a few seconds
+- [#1804591](https://bugzilla.redhat.com/1804591): Heal pending on volume, even after all the bricks are up
+- [#1805668](https://bugzilla.redhat.com/1805668): Memory corruption when glfs_init() is called after glfs_fini()
+- [#1806843](https://bugzilla.redhat.com/1806843): Disperse volume : Ganesha crash with IO in 4+2 config when one glusterfsd restart every 600s
+- [#1807785](https://bugzilla.redhat.com/1807785): seeing error message in glustershd.log on volume start(or may be as part of shd graph regeneration) inet_pton failed with return code 0 [Invalid argument]
+- [#1808964](https://bugzilla.redhat.com/1808964): Set volume option when one of the node is powered off, After powering the node brick processes are offline
+- [#1809438](https://bugzilla.redhat.com/1809438): [brickmux]: glustershd crashed when rebooting 1/3 nodes at regular intervals
+- [#1812849](https://bugzilla.redhat.com/1812849): Setting volume option when one of the glusterd is stopped in the cluster, post glusterd restart seeing couldn't find vol info in glusterd logs and shd, brick process offline
+- [#1061](https://github.com/gluster/glusterfs/issues/1061): [EC] shd crashed while heal failed due to out of memory error.
+- [#1030](https://github.com/gluster/glusterfs/issues/1030): Memory corruption when sending events to an IPv6 host

docs/release-notes/index.md

@@ -7,6 +7,7 @@ Release Notes
 - [7.1](./7.1.md)
 - [7.2](./7.2.md)
 - [7.3](./7.3.md)
+- [7.4](./7.4.md)
 
 ### GlusterFS 6 release notes
 

mkdocs.yml

@@ -107,6 +107,7 @@ nav:
   - Upgrade to 3.5: Upgrade-Guide/upgrade_to_3.5.md
 - Release Notes:
   - index: release-notes/index.md
+  - 7.4: release-notes/7.4.md
   - 7.3: release-notes/7.3.md
   - 7.2: release-notes/7.2.md
   - 7.1: release-notes/7.1.md