Add support for dnQualifier in DNs.

src/libstrongswan/asn1/oid.txt

@@ -33,6 +33,7 @@
     0x2A                     "G"						OID_GIVEN_NAME
     0x2B                     "I"						OID_INITIALS
     0x2D                     "ID"						OID_UNIQUE_IDENTIFIER
+    0x2E                     "dnQualifier"				OID_DN_QUALIFIER
     0x48                     "role"						OID_ROLE
   0x1D                       "id-ce"
     0x09                     "subjectDirectoryAttrs"

src/libstrongswan/utils/identification.c

@@ -81,6 +81,7 @@ static const x501rdn_t x501rdns[] = {
 	{"N", 					OID_NAME,					ASN1_PRINTABLESTRING},
 	{"G", 					OID_GIVEN_NAME,				ASN1_PRINTABLESTRING},
 	{"I", 					OID_INITIALS,				ASN1_PRINTABLESTRING},
+	{"dnQualifier", 		OID_DN_QUALIFIER,			ASN1_PRINTABLESTRING},
 	{"ID", 					OID_UNIQUE_IDENTIFIER,		ASN1_PRINTABLESTRING},
 	{"EN", 					OID_EMPLOYEE_NUMBER,		ASN1_PRINTABLESTRING},
 	{"employeeNumber",		OID_EMPLOYEE_NUMBER,		ASN1_PRINTABLESTRING},
@@ -219,6 +220,7 @@ METHOD(enumerator_t, rdn_part_enumerate, bool,
 		{OID_NAME,				ID_PART_RDN_N},
 		{OID_GIVEN_NAME,		ID_PART_RDN_G},
 		{OID_INITIALS,			ID_PART_RDN_I},
+		{OID_DN_QUALIFIER,		ID_PART_RDN_DNQ},
 		{OID_UNIQUE_IDENTIFIER,	ID_PART_RDN_ID},
 		{OID_EMAIL_ADDRESS,		ID_PART_RDN_E},
 		{OID_EMPLOYEE_NUMBER,	ID_PART_RDN_EN},

src/libstrongswan/utils/identification.h

@@ -171,6 +171,8 @@ enum id_part_t {
 	ID_PART_RDN_G,
 	/** Initials RDN of a DN */
 	ID_PART_RDN_I,
+	/** DN Qualifier RDN of a DN */
+	ID_PART_RDN_DNQ,
 	/** UniqueIdentifier RDN of a DN */
 	ID_PART_RDN_ID,
 	/** Locality RDN of a DN */
@@ -298,7 +300,7 @@ struct identification_t {
  *
  * A distinguished name may contain one or more of the following RDNs:
  * ND, UID, DC, CN, S, SN, serialNumber, C, L, ST, O, OU, T, D,
- * N, G, I, ID, EN, EmployeeNumber, E, Email, emailAddress, UN,
+ * N, G, I, dnQualifier, ID, EN, EmployeeNumber, E, Email, emailAddress, UN,
  * unstructuredName, TCGID.
  *
  * This constructor never returns NULL. If it does not find a suitable