Provide configure flags for various features

configure.ac

@@ -27,6 +27,47 @@ AC_CHECK_LIB(criterion,extmatch,[
   AC_MSG_WARN(See https://github.com/Snaipe/Criterion/)
 ])
 
+AH_TEMPLATE([IMPL_SECURITY],
+        [Define as 1 to restrict each level 58+ god to one site or set of
+         sites])
+AC_ARG_ENABLE([impl-security],
+  [AS_HELP_STRING([--disable-impl-security],
+    [turn off site-locking for gods])],
+  [],
+  [AC_DEFINE([IMPL_SECURITY])])
+
+AH_TEMPLATE([NEW_RENT],
+        [Define as 1 to use newer (more expensive) rent])
+AC_ARG_ENABLE([new-rent],
+  [AS_HELP_STRING([--disable-new-rent],
+     [turn off newer (more expensive) rent])],
+  [],
+  [AC_DEFINE([NEW_RENT])])
+
+AH_TEMPLATE([LEVEL_LOSS],
+  [Define as 1 to enable loss of level at low experience levels])
+AC_ARG_ENABLE([level-loss],
+  [AS_HELP_STRING([--disable-level-loss],
+    [turn off loss of level for low experience])],
+  [],
+  [AC_DEFINE([LEVEL_LOSS])])
+
+AH_TEMPLATE([NEWEXP],
+  [Define as 1 to allow lower exp loss for lower levels])
+AC_ARG_ENABLE([new-exp],
+  [AS_HELP_STRING([--disable-new-exp],
+    [turn off lower exp loss for low level chars])],
+  [],
+  [AC_DEFINE([NEWEXP])])
+
+AH_TEMPLATE([GROUP_NAMES],
+  [Define as 1 to allow for named groups])
+AC_ARG_ENABLE([group-names],
+  [AS_HELP_STRING([--disable-group-names],
+    [turn off group names])],
+  [],
+  [AC_DEFINE([GROUP_NAMES])])
+
 AC_CONFIG_FILES([
   Makefile
   src/Makefile