Memory leak in whoami_s #80
Description
l_ldap_whoami_s leaks a BER data structure on every call.
==29355== 100 (48 direct, 52 indirect) bytes in 3 blocks are definitely lost in loss record 3,782 of 5,810
==29355== at 0x4C2FB6B: malloc (vg_replace_malloc.c:299)
==29355== by 0x14CBD9E4: ber_memalloc_x (memory.c:228)
==29355== by 0x14CBA087: ber_get_stringal (decode.c:582)
==29355== by 0x14CBAAFC: ber_scanf (decode.c:806)
==29355== by 0x14A7C7BD: ldap_parse_extended_result (extended.c:270)
==29355== by 0x14A83799: ldap_parse_whoami (whoami.c:48)
==29355== by 0x14A83941: ldap_whoami_s (whoami.c:95)
==29355== by 0x1485A738: l_ldap_whoami_s (LDAPObject.c:1224)
==29355== by 0x4FC21AE: _PyCFunction_FastCallDict (in /usr/lib64/libpython3.6m.so.1.0)
==29355== by 0x4FC9279: ??? (in /usr/lib64/libpython3.6m.so.1.0)
==29355== by 0x4FF2EC9: _PyEval_EvalFrameDefault (in /usr/lib64/libpython3.6m.so.1.0)
==29355== by 0x4F8BBE9: ??? (in /usr/lib64/libpython3.6m.so.1.0)