clamav: Update to 0.102.1

clamav: Update to 0.102.1

For details see:
https://blog.clamav.net/2019/11/clamav-01021-and-01015-patches-have.html

"Fix for the following vulnerability affecting 0.102.0 and 0.101.4 and prior:

CVE-2019-15961:
A Denial-of-Service (DoS) vulnerability may occur when scanning
a specially crafted email file as a result of excessively long scan
times. The issue is resolved by implementing several maximums in parsing
MIME messages and by optimizing use of memory allocation.

Build system fixes to build clamav-milter, to correctly link with
libxml2 when detected, and to correctly detect fanotify for on-access
scanning feature support.

Signature load time is significantly reduced by changing to a more
efficient algorithm for loading signature patterns and allocating the AC
trie. Patch courtesy of Alberto Wu.

Introduced a new configure option to statically link libjson-c with
libclamav. Static linking with libjson is highly recommended to prevent
crashes in applications that use libclamav alongside another JSON
parsing library.

Null-dereference fix in email parser when using the --gen-json metadata
option.

Fixes for Authenticode parsing and certificate signature (.crb database)
bugs."

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>