Minor enhancement/fix for mc.ext

[mnk]

Concerning objects/libs:
right now:

# Object
type/^ELF
<------>#Open=%var{PAGER:more} %f
<------>View=%view{ascii} file %f && nm %f
# Manual page
# Exception - .so libraries are not manual pages
regex/\.(so|so\.[0-9\.]*)$
<------>View=%view{ascii} file %f && nm %f

What's wrong with it:
in that file top has priority over bottom,
so the second case is never hit (at least on Linux);
also, if shared lib is stripped, no symbols will be reported;
Proposed change:

# Manual page
# Exception - .so libraries are not manual pages
regex/\.(so|so\.[0-9\.]*)$
<------>View=%view{ascii} file %f && nm -C -D %f
# Object
type/^ELF
<------>#Open=%var{PAGER:more} %f
<------>View=%view{ascii} file %f && nm -C %f

(demangling as a bonus)

[mnk]

Sorry, should have quoted, but you'll probably get the idea.