as2-lib 5.1.1

• Updated to ph-commons 11.1
• Added new signing algorithm aliases:
  • sha2_224 - SHA224 alias
  • sha2_256 - SHA256 alias
  • sha2_384 - SHA384 alias
  • sha2_512 - SHA512 alias
• Improved error handling in case of chunked encoding processing
• Finally fixed the issue with chunked Transfer-Encoding in Servlet based environments
• Avoid error in MDN signing when receiver certificate is expired

Full Changelog: as2-lib-parent-pom-5.1.0...as2-lib-parent-pom-5.1.1