build+config: add configuration.{c,h} to Makefile.am, change table definitions to pointers.

WIP.

Makefile.am

@@ -32,6 +32,7 @@ sgminer_CPPFLAGS += -DGIT_VERSION=\"$(GIT_VERSION)\"
 endif
 
 sgminer_SOURCES := miner.c miner.h
+sgminer_SOURCES += configuration.c configuration.h
 sgminer_SOURCES	+= api.c
 sgminer_SOURCES	+= elist.h compat.h
 sgminer_SOURCES	+= util.c util.h uthash.h

configuration.h

@@ -147,7 +147,7 @@ char *set_quota(char *arg);
 
 char *enable_debug(bool *flag);
 
-struct opt_table opt_config_table[];
+struct opt_table *opt_config_table;
-struct opt_table opt_cmdline_table[];
+struct opt_table *opt_cmdline_table;
 
 #endif /* CONFIGURATION_H */