libc: introduce "jehanne_" namespace

With this commit all functions declared in libc.h have been renamed
with the "jehanne_" prefix. This is done for several reason:

- it removes conflicts during symbol resolution when linking
  standard C libraries like newlib or musl
- it allows programs depending on a standard C library to directly
  link to a library depending on our non standard libc (eg libsec).

To ease transiction two files are provided:

- sys/include/lib9.h that can be included instead of <libc.h> to use
  the old names (via a simple set of macros)
- sys/src/lib/c/lib9.c that can be compiled with a program where the
  macro provided by lib9.h are too dumb (see for example rc or grep).

In the kernel port/lib.h has been modified accordingly and some of
the functions it directly provides has been renamed too (eg malloc
in qmalloc.c and print in devcons.c).

qa/lib/c/asmscall.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 int verbose = 1;
 

qa/lib/c/cleanname.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 void
 main(void)

qa/lib/c/conswrite.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 #define BUFSZ (32*1024)
 void

qa/lib/c/hcube.c

@@ -1,5 +1,5 @@
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 int dim = 6;
 

qa/lib/c/lockt.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 QLock rl;
 Rendez rStart;
@@ -85,7 +85,7 @@ main(void)
 	resInWaiter = 0xff;
 
 	spawnWaiter(&l);
-	lock(&l);
+	jehanne_lock(&l);
 
 	alarm(20000);	/* global timeout, FAIL if reached */
 	if (!atnotify(failOnTimeout, 1)){
@@ -112,7 +112,7 @@ main(void)
 	rwakeupall(&rStart);
 	qunlock(&rl);
 	sleep(1200);
-	unlock(&l);
+	jehanne_unlock(&l);
 
 	qlock(&rl);
 	while(elapsedInWaiter == 0)

qa/lib/c/longjmp.c

@@ -1,6 +1,6 @@
 
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 enum {
 	Njmps = 10000

qa/lib/c/privates.c

@@ -8,7 +8,7 @@
  */
 
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 extern void **_privates;
 extern int _nprivates;

qa/lib/c/privates2.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 int spin;
 int ok[2];

qa/lib/c/qlockt0.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that qlockt returns 0 on timeout */
 

qa/lib/c/qlockt1.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that lockt returns 1 if the lock is released and
  * it can take it

qa/lib/c/qlockt2.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that qlockt returns 0 even on tight timeouts */
 

qa/lib/c/rlockt0.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that rlockt returns 0 on timeout */
 

qa/lib/c/rlockt1.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that rlockt returns 1 if the lock is released and
  * it can take it

qa/lib/c/rlockt2.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that rlockt returns 0 even on tight timeouts */
 

qa/lib/c/rsleept0.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that rsleept returns 0 on timeout */
 

qa/lib/c/rsleept1.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that lockt returns 1 if the lock is released and
  * it can take it

qa/lib/c/rsleept2.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that rsleept returns 0 on timeout */
 

qa/lib/c/rwakeup0.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that rwakeup returns 0 on Rendez that has already been awaken */
 

qa/lib/c/sleep.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* Test sleep(2):
  * - sleep cannot be interrupted

qa/lib/c/sqrt.c

@@ -8,7 +8,7 @@
  */
 
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /*
 	sqrtC returns the square root of its floating

qa/lib/c/sysfatal.c

@@ -1,6 +1,6 @@
 
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 void
 main(void)

qa/lib/c/va_copy.c

@@ -1,5 +1,5 @@
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 #include <stdio.h>
 
 void

qa/lib/c/vseprint.c

@@ -9,7 +9,7 @@
  */
 
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 void
 testvseprint(char *buf, int n, char *fmt, ...)
 {

qa/lib/c/wlockt0.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that wlockt returns 0 on timeout */
 

qa/lib/c/wlockt1.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that wlockt returns 1 if the lock is released and
  * it can take it

qa/lib/c/wlockt2.c

@@ -16,7 +16,7 @@
  * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <u.h>
-#include <libc.h>
+#include <lib9.h>
 
 /* verify that wlockt returns 0 even on tight timeouts */