Change from obsolete AM_CONFIG_HEADER to new AC_CONFIG_HEADERS.
htp_utf8_decoder.c: Remove 'inline' keyword for two functions that have external linkage but use statics.

An inline function must have access to any symbols its definition uses.  In this case, it used symbols that did not have external linkage.  But the functions did have external linkage.  So any usage of them outside this file could not possibly be inlined as they would not have access to the symbols they needed.
Merge branch '0.5.x'
Merge branch 'master' of github.com:Qualys/libhtp
Merge branch '0.5.x'
Merge commit '0.5.2'
Merge branch '0.5.x'
Merge commit '0.5.4'
Merge branch '0.5.x'
Merge branch '0.5.x'
Merge branch '0.5.x'
Fix HTP_HOST_AMBIGUOUS false positive, by not checking for differences when one of the port values is not available. It's not the real fix, but it will do for now, until we determine if these checks add any value at all.
Fixed gtest not compiling on OS X 10.9.
Typo.
Tidy up test.
Updates for 0.5.9.
Merge tag '0.5.9'