We've been getting the following error for some pages we're proxying
today:
AH01328: Line too long, URI /pypi/simple/grpcio/,
While we suspect PyPI or its Fastly CDN may have served some unusual
contents for the affected package indices, the content gets cached
and then mod_substitute trips over the result because it (as of
2.3.15) enforces a maximum line length of one megabyte:
https://bz.apache.org/bugzilla/show_bug.cgi?id=56176
Override that default to "5m" per the example in Apache's
documentation:
https://httpd.apache.org/docs/2.4/mod/mod_substitute.html
Change-Id: I5351f0465287f695fb2f1957062182fd3bf6c226