Replace/examine usages of mem* and strcat/strcpy

Replace/examine usages of mem* and strcat/strcpy

The codebase has a large number of mis-uses of memset, memcpy,
strcat, and strcpy.  This patch replaces them with OICStrdup,
OICStrcpy, and OICStrcat where possible, and fixes a number of
issues with memcpy/memset usages throughout the code.

Change-Id: Ifa03ed611778488c28f261266eb9a8821fa4db5c
Signed-off-by: Erich Keane <erich.keane@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1208
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Doug Hudson <douglas.hudson@intel.com>