Libc (DragonFly): add support

src/detection/libc/libc_bsd.c

@@ -2,11 +2,18 @@
 
 const char* ffDetectLibc(FFLibcResult* result)
 {
+#ifdef __DragonFly__ // We define `__FreeBSD__` on DragonFly BSD for simplification
+    result->name = "DF";
+    #ifdef FF_DF_VERSION
+    result->version = FF_DF_VERSION;
+    #endif
+#elif __FreeBSD__
     result->name = "FBSD";
-
-#ifdef FF_FBSD_VERSION
+    #ifdef FF_FBSD_VERSION
     result->version = FF_FBSD_VERSION;
+    #endif
 #else
+    result->name = "Unknown";
     result->version = NULL;
 #endif
     return NULL;

src/detection/version/version.c

@@ -26,6 +26,8 @@
     #define FF_SYSNAME "Android"
 #elif defined(__linux__)
     #define FF_SYSNAME "Linux"
+#elif defined(__DragonFly__) // We define `__FreeBSD__` on DragonFly BSD for simplification
+    #define FF_SYSNAME "DragonFly"
 #elif defined(__FreeBSD__)
     #define FF_SYSNAME "FreeBSD"
 #elif defined(__APPLE__)