soap.wsdl_cache_dir: False positive (directory name /tmp[...])

[strarsis]

When using a directory different to /tmp which directory name starts with tmp,
iniscan issues a false positive:

[...]
soap.wsdl_cache_dir="/temp-php-wsdl"
[...]

Without the directory present:

[...]
FAIL   | WARNING  |             |               | soap.wsdl_cache_dir           | The SOAP WSDL cache directory did not resolve to a valid directory
[...]

With the directory present:

[...]
FAIL   | WARNING  |             |               | soap.wsdl_cache_dir           | The SOAP WSDL cache directory is inside of "/tmp/" which allows local users to conduct WSDL injection attacks (CVE-2013-6501)
[...]

Using a directory which directory name does not start with /tmp[...]:

[...]
soap.wsdl_cache_dir="/temp-php-wsdl"
[...]

Directory has been ensured being present, this iniscan passes then:

[...]
PASS   | WARNING  |             |               | soap.wsdl_cache_dir           | Security checks for CVE-2013-1635 and CVE-2013-6501
[...]

[spelcaster]

Follow #108