1) Changed usage of malloc,free,strdup to qemu_malloc,qemu_free,qemu_strdup
 	2) Some coding style fixes (based on CODING_STYLE document)
 	3) Free struct addrinfo *res after failure of listen

Signed-off-by: vibi <vibi_sreenivasan@cms.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>