tmpfiles: support the FS_PROJINHERIT_FL chattr flag
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 96b619f..5251c74 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -1110,7 +1110,8 @@
          FS_UNRM_FL         |                   \
          FS_NOTAIL_FL       |                   \
          FS_TOPDIR_FL       |                   \
-         FS_NOCOW_FL)
+         FS_NOCOW_FL        |                   \
+         FS_PROJINHERIT_FL)
 
 static int parse_attribute_from_arg(Item *item) {
 
@@ -1132,6 +1133,7 @@
                 { 't', FS_NOTAIL_FL },       /* file tail should not be merged */
                 { 'T', FS_TOPDIR_FL },       /* Top of directory hierarchies */
                 { 'C', FS_NOCOW_FL },        /* Do not cow file */
+                { 'P', FS_PROJINHERIT_FL },  /* Inherit the quota project ID */
         };
 
         enum {