db: checksum installed files, protect config files

Checksum of installed is computed on the fly when extracting them
and it'll be saved to fdb. When installing config files those are
diverted with suffix .apk-new if earlier version of same file with
local changes exist.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/md5.c b/src/md5.c
index e165724..82e670b 100644
--- a/src/md5.c
+++ b/src/md5.c
@@ -58,6 +58,8 @@
 
 #include "md5.h"
 
+md5sum_t bad_checksum = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+
 /* Handle endian-ness */
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define SWAP(n) (n)