Now have a function called selinux_context_cmp which will compare two 
context ignoring the user componant for equivalency.

Fixed selinux_verify_file_context to work properly,  default_canoncon 
now checks myflags for MATCHPATHCON_NOTRANS

Added selinux_lsetfilecon_default(const char* path)

to set a file context to match the entry in file_contexts file.  
Changing install command to use this function improved perfomance

# time install resolv.conf /etc/

real    0m0.251s
user    0m0.176s
sys     0m0.040s
# ls -lZ /etc/resolv.conf
-rwxr-xr-x  root root system_u:object_r:net_conf_t     /etc/resolv.conf
# time ./ginstall resolv.conf /etc/

real    0m0.007s
user    0m0.000s
sys     0m0.008s
# ls -lZ /etc/resolv.conf
-rwxr-xr-x  root root system_u:object_r:net_conf_t     /etc/resolv.conf