Fix weird first/not-first lameness in font matches, replacing with target
    qualifiers on test elements. Update library manual page.

• fontconfig/fcprivate.h[diff]
• fontconfig/fontconfig.h[diff]
• fonts.conf.in[diff]
• fonts.dtd[diff]
• src/fccfg.c[diff]
• src/fcdbg.c[diff]
• src/fcint.h[diff]
• src/fclist.c[diff]
• src/fcmatch.c[diff]
• src/fcname.c[diff]
• src/fcpat.c[diff]
• src/fcxml.c[diff]
• src/fontconfig.man[diff]