Standardize patch format -p1.  Change patches using -p0 to -p1 patches from other Linux distributions.
Add patch attribution in PKGBUILD where absent.
Standardize patch naming.
Switch to auto applying all source array patches now format has been standardized.

_BSD_SOURCE has been depracted in glibc since 2.20 [1] and any compilation unit including a header from glibc will trigger a warning because _BSDSOURCE is defined in wvstream's CPPFLAGS.  Define _DEFAULT_SOURCE which is the replacement for _BSD_SOURCE and prevents the warning.

[1]: https://sourceware.org/legacy-ml/libc-alpha/2014-09/msg00088.html

Patch from Gentoo [1]:

[1] https://gitweb.gentoo.org/repo/gentoo.git/plain/net-libs/wvstreams/files/wvstreams-4.6.1-parallel-make.patch

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u

Sadly looks like it's still broken