* doc/mc.1.in, mc.hlp: updated (these files haven't been updated
at the last change to mc.sgml)
* doc/mc.sgml: spelling error corrected
* Makefile.in: renamed all references of mc.1 to mc.1.in
* find.c (locate_egrep): Don't use an absolute path if egrep isn't
found at the usual places. Then execvp will search the directories
passed in the environment PATH variable (a little bit slower but
better than a defunct find content).
* tree.c: removed the include file I mistakenly added with my
last patch.
