textproc/libxml2-python MidnightBSD

`textproc/libxml2` 2.15 changed SONAME from `libxml2.so.2` to `libxml2.so.16` **and** removed ELF symbol versioning entirely — the new library defines no `LIBXML2_*` versions at all. Consumers built against the old library were never rebuilt, so they still record a dependency on `libxml2.so.2` plus version requirements nothing can satisfy, and fail at load time: ``` ld-elf.so.1: /usr/local/lib/libxml2.so.2: version LIBXML2_2.4.30 required by /usr/local/lib/libevdocument3.so.4 not defined ``` ### Scope `Tools/scripts/bump_revision.pl -f -l textproc/libxml2` — **436 Makefiles**: 323 revisions incremented, 113 gained a `PORTREVISION` line. The diff touches nothing but `PORTREVISION` lines (verified: `git diff -U0` shows no other changed line), and spot-checked ports still …

Update libxml2 from 2.15.3 to 2.15.4, a security release. ## Security fixes (upstream NEWS) - xmlregexp: out-of-bounds read in the `NXT` macro - missing overflow checks in `dict.c`, `uri.c` and `valid.c` - xmlregexp: string length calculated before NULL check - xpointer: overflow in `xmlXPtrEvalXPtrPart` - xmlIO: integer overflow before calling `writecallback` - xinclude: `parseFlags` not propagated in `xmlXIncludeProcess`/`xmlXIncludeProcessTree` Also fixes a double free in `xmlIOParseDTD`, a division by zero when `maxAmpl` is 0, a NULL deref in catalog handling, and several memory leaks. ## Port changes - `textproc/libxml2/Makefile` — `DISTVERSION` 2.15.3 → 2.15.4 - `textproc/libxml2/distinfo` — regenerated with `bmake makesum` …