bitmanipulation: fix undefined behavior in bit shift in getbe32 OSS-Fuzz caught this in its ubsan mode[0]. I'm not worried about a security issue here because in practice this should work out the way we naively expected, we're just making things explicit to the compiler with the casts. 0: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8876 Differential Revision: https://phab.mercurial-scm.org/D3729

lazymanifest: don't crash when out of memory (issue5916) self->lines can be NULL if we failed to allocate memory for it.

cext: stop worrying and love the free(NULL) There is no need to check for a NULL pointer before calling free since free(NULL) is defined by C standards as a no-op. Lots of software relies on this behavior so it is completely safe to call even on the most obscure of systems.

templatefilters: undeprecate hgdate See the previous patch for why. Backed out changeset 0fe65bb7e160

templater: restore the original string format of {date} Unfortunately, python-hglib relies on that. I could fix python-hglib, but there would be other tools that take a decimal separator as the separator of unixtime and tzoffset. The showfmt is set per instance since new code uses '%d %d' format by default.

hgweb: insist http_status value is a sysstr My previous change was extremely confusing to figure out, because I thought I was looking at a client-side problem. For the low cost of an isinstance assert, we can make those errors not happen in the future. Differential Revision: https://phab.mercurial-scm.org/D3727

hgweb: pass a sysstr to low-level _start_response method This fixes a regression in Python 3 support introduced in 7de7bd407251 on the stable branch. We're so early in do_hgweb that I don't see any especially better choices than this. Differential Revision: https://phab.mercurial-scm.org/D3726

tests: fix printenv script on Python 3 Differential Revision: https://phab.mercurial-scm.org/D3725