Updated libvncserver packages fix security vulnerability

Updated libvncserver packages fix security vulnerabilities: libvncclient/sockets.c in LibVNCServer had a buffer overflow via a long socket filename (CVE-2019-20839). libvncserver/rfbregion.c had a NULL pointer dereference (CVE-2020-14397). Byte-aligned data was accessed through uint32_t pointers in libvncclient/rfbproto.c (CVE-2020-14399). Byte-aligned data was accessed through uint16_t pointers in libvncserver/translate.c (CVE-2020-14400). libvncserver/scale.c had a pixel_value integer overflow (CVE-2020-14401). libvncserver/corre.c allowed out-of-bounds access via encodings (CVE-2020-14402). libvncserver/hextile.c allowed out-of-bounds access via encodings (CVE-2020-14403). libvncserver/rre.c allowed out-of-bounds access via encodings (CVE-2020-14404). libvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405). The libvncserver package has been updated to version 0.9.13, fixing these issues and several others. See the release announcement for details.