See http://cppcheck.sf.net

[./build/libglusterfs/src/y.tab.c:2104]: (error) Memory leak: cmd
[./libglusterfs/src/md5.c:306]: (error) Resource leak: f
[./xlators/debug/io-stats/src/io-stats.c:1396]: (error) Possible null pointer dereference: this - otherwise it is redundant to check if this is null at line 1402
[./xlators/cluster/stripe/src/stripe.c:3597]: (error) Memory leak: dup_str
[./xlators/debug/trace/src/trace.c:2426]: (error) Possible null pointer dereference: this - otherwise it is redundant to check if this is null at line 2429

These appear in rarely hit error cases or test/demo code so nothing
serious, in fact.

Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 420 (fix leaks pointed out by cppcheck static analyzer)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=420

gf_rsync_weak_checksum:   Calculates a simple 32-bit checksum.
gf_rsync_strong_checksum: Calculates the MD5 checksum.

The strong checksum function makes use of Christophe Devine's
MD5 implementation (adapted from the rsync source code,
version 3.0.6. <http://www.samba.org/ftp/rsync/>).

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>