support for cp437 and cp850 was added, fixes #2870.

ldconfig is used by some packages' install script to create the
SONAME symlinks in the DESTDIR. do those symlinks for non-system
directories.

libiconv exists and is empty. libiconv-dev exists and had empty
libiconv.a as compatibility wrapper, so we need to be able to
pull it in.

This is better than replaces

fixes important memmem bug, getent is a whole lot faster. additionally
the netlink patch is optimized a bit.

this fixes issues with dhcpcd. cherry-pick also one more printf
formatting fix from musl git.

* armv6 patch is there now (including an important fix)
* two additional important bug fixes

needed for drbd

fixes musl to work with grsec kernel on arm

 * remove the upstreamed confstr patch
 * remove relro patch which got fixed and upstreamed, ref #2614
   (the old version did not relro protect libc.so itself)
 * workaround for gcc pr58245 is no longer needed as thread pointer
   is always initialized and the lazy ssp init is removed

ref #2614

needed for openjdk6/icedtea building

remove upstreamed and backport patches

fixes runtime brekage of lxc build

this fixes the one failing test case of perl-io-async.

multiple bug fixes, and sys/timeb.h with ftime() implemented increasing
compatibility with old applications.

also add dummy ldconfig

in alpine we have gnu gettext with libintl, so remove the dummy
wrappers as they would otherwise cause conflicts.

 - take maintainership
 - provide libssp_nonshared for simplifying gcc build

Since we don't run ./configure, the prefix needs to be explicitly passed
to make. Affects only crosscompiler creation (so no pkgrel bump).