Format string bugs in few functions.
vulners.com/securityvulns/securityvulns:doc:6072
vulners.com/securityvulns/securityvulns:doc:6082
vulners.com/securityvulns/securityvulns:doc:6093
vulners.com/securityvulns/securityvulns:doc:6096
vulners.com/securityvulns/securityvulns:doc:6202
vulners.com/securityvulns/securityvulns:doc:6237