Log Message:
Improve wrapper script, closing to usual behavior.
 * Pass settings to nvi with env NEXINIT instead of EXINIT, to avoid affect of \ 
env NEXINIT.
 * Honor NEXINIT, EXINIT environment variable.
 * Pass all setting in ~/.{n}exrc by using source command.  Fixes PR 13677.

Bump PKGREVISION.