net-p2p/edonkey-tool-hash: the port had been improved (+)

• Do not invent our own PORTNAME and just use the upstream one
• Rephrase and shorten COMMENT, fix LICENSE, take maintainership
• Specify C++03 to unbreak configuring with FLTK support, but better build the port against one particular C++ standard regardless of the selected options
• Use existing installation routine (it also installs documentation)
• Fix wrong types usage and thus hash production on 64-bit systems

Obtained from: Debian (typedef fix)