Remove use of Forwardable from ExternalPatch
unrtf: use checksummed patches
unshield: use checksummed patches
urlview: use checksummed patches
webfs: use checksummed patches
wordplay: use checksummed patches
zzuf: use checksummed patches
libbson 0.6.4

Closes #27563.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Use Formula#system and existing error handling in scons helper

Fixes #27553.
mruby: fix checksum
s3cmd: fix checksums

Closes #27551.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
postgresql: Remove encoding from initdb command

This is either redundant or will create a failure when the user has a non-UTF8 locale set.

Closes #27556.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>