Released v1.8

• configure.ac: Display files paths at the end of configure
• configure.ac: Simplify file
• ForbidHosts.cpp: Make use of user provided paths for files
• configure.ac: Allow to define auth.log and hosts.deny path by env var
• configure.ac: Simplify file
• ForbidHosts.cpp: Move deny file path to a constant string
• ForbidHosts.cpp: Use default assignement for FirstSeen
• ForbidHosts.cpp: Prevent race condition in the signal handler
• ForbidHosts.cpp: Also make constants static
• ForbidHosts.cpp: Remove unused constants
• ForbidHosts.cpp: Make const char pointers const
• ForbidHosts.cpp: Make constants notation consistent
• ForbidHosts.cpp: Fix a cppcheck warning
• ForbidHosts.cpp: C++ify code
• ForbidHosts.cpp: Already add a newly found host if its attempts beat max attempts
• ForbidHosts.cpp: Increase the penalty taking into account the number of attempts
• ForbidHosts.cpp: Take into account repeated lines that directly state the repeated message
• configure.ac: Add a sum up of the build configuration at the end of configure script