reinstall deprecated ddca_create_display_ref(), bump version

allows old clients to build

configure.ac

@@ -16,7 +16,7 @@ AC_PREREQ([2.69])
 
 m4_define([ddcutil_major_version], [2])
 m4_define([ddcutil_minor_version], [1])
-m4_define([ddcutil_micro_version], [3])
+m4_define([ddcutil_micro_version], [4])
 dnl ddcutil_version_suffix does not begin with hyphen, e.g. "dev", not "-dev"
 m4_define([ddcutil_version_suffix], [""])
 # m4_ifelse(ddcutil_version_suffix,[], m4_define([ddcutil_version], [a]),define([ddcutil_version],[b]))

src/libmain/api_displays.c

@@ -307,30 +307,8 @@ ddca_get_display_ref(
 }
 
 
-#ifdef REMOVED
 
-/** @deprecated use #ddca_get_display_ref()
- *  Gets a display reference for a display identifier.
- *  Normally, this is a permanently allocated #DDCA_Display_Ref
- *  created by monitor detection and does not need to be freed.
- *  Use #ddca_free_display_ref() to safely free.
- *
- *  @param[in]  did      display identifier
- *  @param[out] dref_loc where to return display reference
- *  @retval     0                     success
- *  @retval     DDCRC_ARG             did is not a valid display identifier handle
- *  @retval     DDCRC_INVALID_DISPLAY display not found
- *
- *  @ingroup api_display_spec
- */
-// __attribute__ ((deprecated ("use ddca_get_display_ref()")))
-DDCA_Status
-ddca_create_display_ref(
-      DDCA_Display_Identifier did,
-      DDCA_Display_Ref*       dref_loc);
-#endif
 
-#ifdef REMOVED
 // deprecated
 DDCA_Status
 ddca_create_display_ref(
@@ -339,7 +317,6 @@ ddca_create_display_ref(
 {
    return ddca_get_display_ref(did, dref_loc);
 }
-#endif
 
 #ifdef REMOVED
 /** @deprecated All display references are persistent

src/public/ddcutil_c_api.h

@@ -731,6 +731,27 @@ ddca_did_repr(
 // Display Reference
 //
 
+/** @deprecated use #ddca_get_display_ref()
+ *  Gets a display reference for a display identifier.
+ *  Normally, this is a permanently allocated #DDCA_Display_Ref
+ *  created by monitor detection and does not need to be freed.
+ *  Use #ddca_free_display_ref() to safely free.
+ *
+ *  @param[in]  did      display identifier
+ *  @param[out] dref_loc where to return display reference
+ *  @retval     0                     success
+ *  @retval     DDCRC_ARG             did is not a valid display identifier handle
+ *  @retval     DDCRC_INVALID_DISPLAY display not found
+ *
+ *  @ingroup api_display_spec
+ */
+// __attribute__ ((deprecated ("use ddca_get_display_ref()")))
+DDCA_Status
+ddca_create_display_ref(
+      DDCA_Display_Identifier did,
+      DDCA_Display_Ref*       dref_loc);
+
+
 /** Gets a display reference for a display identifier.
  *  This is a permanently allocated #DDCA_Display_Ref
  *  created by monitor detection and does not need to be freed.