Fix maxminddb link on FreeBSD

Issue #2131

Author: zimmerle

CHANGES

@@ -1,6 +1,8 @@
 v3.x.y - YYYY-MMM-DD (to be released)
 -------------------------------------
 
+  - Fix maxminddb link on FreeBSD
+    [Issue #2131 - @granalberto, @zimmerle]
   - Fix IP address logging in Section A
     [Issue #2300 - @inaratech, @zavazingo, @martinhsv]
   - Adds support to lua 5.4

build/libmaxmind.m4

@@ -15,7 +15,7 @@ AC_REQUIRE([PKG_PROG_PKG_CONFIG])
 
 
 # Possible names for the maxmind library/package (pkg-config)
-MAXMIND_POSSIBLE_LIB_NAMES="libmaxminddb maxminddb maxmind"
+MAXMIND_POSSIBLE_LIB_NAMES="maxminddb maxmind"
 
 # Possible extensions for the library
 MAXMIND_POSSIBLE_EXTENSIONS="so la sl dll dylib"