Log Message:
Update to 1.7.3

Changelog:
Bug

    [SANTUARIO-378] - xml-security-c cannot initialise on a Windows system with \ 
mandatory user profiles
    [SANTUARIO-380] - Avoid use of PATH_MAX where possible
    [SANTUARIO-381] - Spelling error in \ 
xsec/enc/OpenSSL/OpenSSLCryptoSymmetricKey.cpp
    [SANTUARIO-384] - OpenSSLCryptoKeyEC::signBase64SignatureDSA fails most of time
    [SANTUARIO-400] - Buffer overwrite in WinCAPICryptoSymmetricKey::encrypt() \ 
(WinCAPICryptoSymmetricKey.cpp)
    [SANTUARIO-409] - Win32 unicode build breaks due to wchar_t * passed to \ 
GetProcAddress()
    [SANTUARIO-426] - xml-security-c-1.7.3 not getting build on AIX with \ 
xerces-c-3.1.2

Improvement

    [SANTUARIO-386] - Spec file patch to add RHEL7 support