main/musl: cherry-pick fixes, update alpine specific patches

four additional fixes from upstream git.

dns patch fixed to implement ns_{put,get}* as real functions,
and macro ns_msg_getflag added.

netlink patch is reworked to provide alias interface names
for ipv4 where appropriate, and for ipv6 link-local scope ids.
few error paths have been fixed, and if_nameindex() memory
allocation strategy has been improved.

setxid patch added.

1 files changed, 27 insertions, 0 deletions

diff --git a/main/musl/0009-fix-crash-in-regexec-for-nonzero-nmatch-argument-wit.patch b/main/musl/0009-fix-crash-in-regexec-for-nonzero-nmatch-argument-wit.patch
new file mode 100644
index 0000000000..ffef918c0c
--- /dev/null
+++ b/main/musl/0009-fix-crash-in-regexec-for-nonzero-nmatch-argument-wit.patch
@@ -0,0 +1,27 @@
+From 72ed3d47e567b1635a35d3c1d174c8a8b2787e30 Mon Sep 17 00:00:00 2001
+From: Rich Felker <dalias@aerifal.cx>
+Date: Thu, 17 Jul 2014 19:56:27 -0400
+Subject: [PATCH] fix crash in regexec for nonzero nmatch argument with
+ REG_NOSUB
+
+per POSIX, the nmatch and pmatch arguments are ignored when the regex
+was compiled with REG_NOSUB.
+---
+ src/regex/regexec.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/regex/regexec.c b/src/regex/regexec.c
+index 855cef5..2e35b83 100644
+--- a/src/regex/regexec.c
++++ b/src/regex/regexec.c
+@@ -983,6 +983,7 @@ regexec(const regex_t *restrict preg, const char *restrict string,
+   tre_tnfa_t *tnfa = (void *)preg->TRE_REGEX_T_FIELD;
+   reg_errcode_t status;
+   int *tags = NULL, eo;
++  if (tnfa->cflags & REG_NOSUB) nmatch = 0;
+   if (tnfa->num_tags > 0 && nmatch > 0)
+     {
+       tags = xmalloc(sizeof(*tags) * tnfa->num_tags);
+-- 
+2.0.2
+