Problem: need to maintain template files not generated by zproject

[jimklimov]

Solution: similar to what is done by <bin> tag for scripts and <extra> for "other files", add support in project.xml for template (*.in) files (to generate entries into configure.ac and .gitignore and Makefile / EXTRA_DIST - installation and dstribution may be handled by e.g. Makemodule-local.am).

[bluca]

There's also an autoconf local hook (acinclude.m4) so project-local AC_CONFIG_FILES and EXTRA_DIST can be added (and also for CMake there's a local hook)

[bluca]

A few examples in case they can be useful:

https://github.com/zeromq/malamute/blob/master/acinclude.m4
https://github.com/zeromq/zyre/blob/master/acinclude.m4
https://github.com/zeromq/zyre/blob/master/src/Makemodule-local.am
https://github.com/zeromq/zyre/blob/master/src/CMakeLists-local.txt

[jimklimov]

Addressed back then but not closed, in commits around PR #1079 and #1078 with origins from #202 and #768