sysutils/e2fsprogs: Update to 1.45.6
Add three patches (one was extended) by Ted Y. Ts'o to fix various
issues (loff_t and type related).
Drop our own obsolete patches.
While here, drop obsolete parts of some of our patches
(malloc.h -> stdlib.h).
Since the online release notes are not available yet,
this is from doc/RelNotes/v1.45.6.txt, omitting Linux-/Hurd-specifics.
UI and Features
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