REORG: config: extract the global section parser into cfgparse-global

The config parser is the largest file to build and its build dominates
the total project's build time. Let's start to split it into multiple
smaller pieces by extracting the "global" section parser into a new
file called "cfgparse-global.c". This removes 1/4th of the file's build
time.

Makefile

@@ -903,7 +903,8 @@ else
 all: haproxy $(EXTRA)
 endif
 
-OBJS = src/proto_http.o src/cfgparse.o src/server.o src/stream.o        \
+OBJS = src/proto_http.o src/cfgparse.o src/cfgparse-global.o            \
+       src/server.o src/stream.o                                        \
        src/flt_spoe.o src/stick_table.o src/stats.o src/mux_h2.o        \
        src/checks.o src/haproxy.o src/log.o src/dns.o src/peers.o       \
        src/standard.o src/sample.o src/cli.o src/stream_interface.o     \

include/common/cfgparse.h

@@ -36,6 +36,13 @@
 #define CFG_USERLIST	3
 #define CFG_PEERS	4
 
+/* various keyword modifiers */
+enum kw_mod {
+	KWM_STD = 0,  /* normal */
+	KWM_NO,       /* "no" prefixed before the keyword */
+	KWM_DEF,      /* "default" prefixed before the keyword */
+};
+
 struct cfg_keyword {
 	int section;                            /* section type for this keyword */
 	const char *kw;                         /* the keyword itself */
@@ -59,10 +66,35 @@ struct cfg_kw_list {
 	struct cfg_keyword kw[VAR_ARRAY];
 };
 
+/* permit to store configuration section */
+struct cfg_section {
+	struct list list;
+	char *section_name;
+	int (*section_parser)(const char *, int, char **, int);
+	int (*post_section_parser)();
+};
+
+/* store post configuration parsing */
+
+struct cfg_postparser {
+	struct list list;
+	char *name;
+	int (*func)();
+};
+
+/* some of the most common options which are also the easiest to handle */
+struct cfg_opt {
+	const char *name;
+	unsigned int val;
+	unsigned int cap;
+	unsigned int checks;
+	unsigned int mode;
+};
 
 extern int cfg_maxpconn;
 extern int cfg_maxconn;
 extern char *cfg_scope;
+extern struct cfg_kw_list cfg_keywords;
 
 int cfg_parse_global(const char *file, int linenum, char **args, int inv);
 int cfg_parse_listen(const char *file, int linenum, char **args, int inv);
@@ -89,6 +121,7 @@ int too_many_args(int maxarg, char **args, char **msg, int *err_code);
 int alertif_too_many_args_idx(int maxarg, int index, const char *file, int linenum, char **args, int *err_code);
 int alertif_too_many_args(int maxarg, const char *file, int linenum, char **args, int *err_code);
 int parse_process_number(const char *arg, unsigned long *proc, int *autoinc, char **err);
+unsigned long parse_cpu_set(const char **args, unsigned long *cpu_set, char **err);
 
 /*
  * Sends a warning if proxy <proxy> does not have at least one of the