git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2507 44740490-163a-0410-bde0-09ae8108e29a

Since this function is only used in SimpleSAML_Error_Exception and a
subclass, move it here.

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Only used in the SimpleSAML_Session class, so move it there.

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- strleft
- array_values_equals
- checkAssocArrayRules

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Replace uses of utilities::selfURLhost() followed by config->getBaseURL with a call to utilities::getBaseURL().

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If UserID isn't set in $state, it means that we were unable to retrieve
it previously. Trying again isn't likely to succeed.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2377 44740490-163a-0410-bde0-09ae8108e29a

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By default '$' matches end of string, or newline at end of string,
which made it possible to add a trailing newline to some strings that
shouldn't have it.

As far as I can tell, none of the errors presented a security problem.

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This fixes a potential situation where another user creates the
temporary before simpleSAMLphp attempts to create it. Anther user
creating the directory could make simpleSAMLphp overwrite arbitrary
files on the system.

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This function returns the absolute URL to the base of the simpleSAMLphp
installation, and should be used instead of:

SimpleSAML_Utilities::selfURLhost() . '/' . $config->getBaseURL()

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This code would create a loop in the error handler under windows.
Instead of trying to open the file, and handle the error, instead
check whether the file exists first.

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