musl: backport various post-1.1.15 fixes

Backport most important fixes up to latest HEAD

- Taken post-commit reverts/fixes into account

Compile tested
Run-tested on cns3xxx & imx6 targets

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

toolchain/musl/patches/035-fix-getservby_r-result-pointer-value-on-error.patch

@@ -0,0 +1,41 @@
+From 8d7a3f40c8de414122eb8eb2131291782ee8ed15 Mon Sep 17 00:00:00 2001
+From: Daniel Sabogal <dsabogalcc@gmail.com>
+Date: Fri, 23 Sep 2016 21:10:07 -0400
+Subject: fix getservby*_r result pointer value on error
+
+this is a clone of the fix to the gethostby*_r functions in
+commit fe82bb9b921be34370e6b71a1c6f062c20999ae0. the man pages
+document that the getservby*_r functions set this pointer to
+NULL if there was an error or if no record was found.
+---
+ src/network/getservbyname_r.c | 2 ++
+ src/network/getservbyport_r.c | 1 +
+ 2 files changed, 3 insertions(+)
+
+diff --git a/src/network/getservbyname_r.c b/src/network/getservbyname_r.c
+index 056c2f3..ad3d616 100644
+--- a/src/network/getservbyname_r.c
++++ b/src/network/getservbyname_r.c
+@@ -15,6 +15,8 @@ int getservbyname_r(const char *name, const char *prots,
+ 	struct service servs[MAXSERVS];
+ 	int cnt, proto, align;
+ 
++	*res = 0;
++
+ 	/* Align buffer */
+ 	align = -(uintptr_t)buf & ALIGN-1;
+ 	if (buflen < 2*sizeof(char *)+align)
+diff --git a/src/network/getservbyport_r.c b/src/network/getservbyport_r.c
+index a0a7cae..0ae0e41 100644
+--- a/src/network/getservbyport_r.c
++++ b/src/network/getservbyport_r.c
+@@ -20,6 +20,7 @@ int getservbyport_r(int port, const char *prots,
+ 		if (r) r = getservbyport_r(port, "udp", se, buf, buflen, res);
+ 		return r;
+ 	}
++	*res = 0;
+ 
+ 	/* Align buffer */
+ 	i = (uintptr_t)buf & sizeof(char *)-1;
+-- 
+cgit v0.11.2