REORG: ssl: move utility functions to src/ssl_utils.c

These functions are mainly used to extract information from
certificates.
diff --git a/Makefile b/Makefile
index 846c0c3..33835a7 100644
--- a/Makefile
+++ b/Makefile
@@ -542,7 +542,7 @@
 ifneq ($(USE_DL),)
 OPTIONS_LDFLAGS += -ldl
 endif
-OPTIONS_OBJS  += src/ssl_sample.o src/ssl_sock.o src/ssl_crtlist.o src/ssl_ckch.o src/cfgparse-ssl.o
+OPTIONS_OBJS  += src/ssl_sample.o src/ssl_sock.o src/ssl_crtlist.o src/ssl_ckch.o src/ssl_utils.o src/cfgparse-ssl.o
 endif
 
 # The private cache option affect the way the shctx is built