Merge pull request #874 from spiridoncha/master

Change /clear behaviour. Closes issue #855.

src/config/preferences.c

@@ -1646,6 +1646,7 @@ _get_group(preference_t pref)
 {
     switch (pref)
     {
+        case PREF_CLEAR_PERSIST_HISTORY:
         case PREF_SPLASH:
         case PREF_BEEP:
         case PREF_THEME:
@@ -1773,6 +1774,8 @@ _get_key(preference_t pref)
 {
     switch (pref)
     {
+        case PREF_CLEAR_PERSIST_HISTORY:
+            return "clear.persist_history";
         case PREF_SPLASH:
             return "splash";
         case PREF_BEEP:

src/config/preferences.h

@@ -46,6 +46,7 @@
 // represents all settings in .profrc
 // each enum value is mapped to a group and key in .profrc (see preferences.c)
 typedef enum {
+    PREF_CLEAR_PERSIST_HISTORY,
     PREF_SPLASH,
     PREF_BEEP,
     PREF_VERCHECK,