Allow usage of symbolic user/group names in config file

--- ./generic.c
+++ ./generic.c
@@ -1,5 +1,6 @@
 #include "policyd.h"
-
+#include <pwd.h>
+#include <grp.h>
 /*
  *
  *
@@ -79,15 +80,23 @@ read_conf(unsigned int prog)
     /* UID */
     if(strncmp(confbuf, "UID=", 4) == 0)
     { 
-      extract(0, confbuf, 3);
-      UID=atol(extract_array[0]);
+      struct passwd *pw;
+      extract_conf(0, confbuf, 3);
+      if ((pw=getpwnam(extract_array_conf[0]))!=NULL)
+         UID=pw->pw_uid;
+      else
+         UID=atol(extract_array_conf[0]);
     }
 
     /* GID */
     if(strncmp(confbuf, "GID=", 4) == 0)
-    { 
-      extract(0, confbuf, 3);
-      GID=atol(extract_array[0]);
+    {
+      struct group *gr; 
+      extract_conf(0, confbuf, 3);
+      if ((gr=getgrnam(extract_array_conf[0]))!=NULL)
+        GID=gr->gr_gid;
+      else
+        GID=atol(extract_array_conf[0]);
     }
 
     /* DEBUG MODE */